Put this between your guitar and amp or pedalboard.

Some say to only use the included power supply.

Two settings.. normal and high.

Our practice space is apparently possessed as every single coil pickup has a directional hum. Point the guitar in a specific way and the hum will go away. Move even an inch and the hum is back.

Our guitarists use these and it has been a lifesaver. It does impart a "sound," but it does remove the hum.

As far as using it to record, yeah-- but again it does have a sound, not sure how to describe it. The closest way to describe it is sounds like digital sampling artifacts. Think of an 80's Eventide or a Boss-- I think it was a DD-2. It just has a hashy/gritty sound especially at the Max setting and at specific frequencies.

Don't get me wrong-- this thing works great. I guess I would have to wonder if you were in a good studio the hum would not be an issue. For bands that run into this at their location-- this is definitely a lifesaver.

It does give "character" to the sound, but I think that the removal of the hum outweighs the sound coloration.

At my house, I'm not sure if my problem is dirty power, or electromagnetic interference in the area, but I get what sounds like 60 cycle hum from my rig regardless of pickup, guitar, or amp. Active, passive, humbucker, Lace Sensor, even the bass...they all do it. This is prevalent on clean tones as well and really couldn't be solved with a noise gate.

In any event, this solves it. It is a quick fix for what seems like a larger environmental problem in my case.
Cheaper than a new house as well.
I bought two.

This Electro-Hamonix Hum Debugger hum eliminator pedal was bought for use on our Fender Tone Master Deluxe Reverb amp which had a slight hum issue. It worked great for what we needed from it almost entirely eliminating hum while making no difference in the good guitar tones coming from our Tone Master.

I've never been so thrilled with a piece of gear that doesn't make a sound! As others have mentioned, there's slight metallic echo—very slight and very short. When playing live you don't hear it. No tonal changes that I can notice. There's one club we play at regularly that has the WORST hum ever. Since I don't have any guitars with humbuckers it has always been a real problem. I used it the other night and ... nothing. No hum. I wish I'd found this years ago!

Perfect silence. No sound what so ever. The Greatest.

I've used the Hum Debugger since it was introduced. It allows me to use my couple of P90, Franz, and Fender single coil pickup equipped guitars without having to stay rooted to the one quiet orientation position with the amp, or to feel the need to quickly lower the volume control at the end of a tune. Especially helpful at modest to moderate volume levels as found in dinner restaurants, small jazz clubs, society gigs. I'll put it in the chain for Blues gigs and turn it off for a particularly raw, swampy tune. I've also turned it on while using humbuckers in places where the electrical system was installed by Rube Goldberg. I've knocked just a little off because the effect is not 100% transparent, but that's not noticeable to the majority of people and can be compensated for easily with a little volume/tone control tweaking.. Now, if it could only be powered using a birDCord and Lithium Ion battery pack.

I have one P90 guitar that noise renders nearly unusable. I was looking for solutions, with Reddit along with various message boards telling me that the Hum Debugger is the answer to all of my problems.

I now understand that these people must be EHX stakeholders, desperate to rid themselves of excess inventory. This is the only explanation I can think of as to why anyone would recommend this pedal to anyone.

Does it bring the level of hum down? Sure does! Does it bring it down enough to matter? Sure doesn't! Does it suck tone? Maybe? It definitely changed the tone quite a bit, and when I tried running it on the Strong setting through high gain, it added some sort of robotic element to the tone.

I'm really annoyed that I spent this much money on a pedal that doesn't do what it was supposed to, and does what I was promised it didnt.

If I didn't have to pay to ship it back to Sweetwater, I would return it. As it stands, I'm going to put it back in the box and stick in the back of my closet in the hopes that in 20 years, some young kid with a stupid haircut is going to make a hit record with one of these things and I can sell it for 200x time what I bought it for.

This pedal is bad and it should feel bad. You'd be better off taking the money you would spent on this, and using it to start a gambling addiction.

It works wonderfully. I have a Tele and a Jazzmastet, I can now enjoy my single coils in all positions without any hum.

I play an early 1960s Martin F-50 archtop that has one single-coil (TV JONES) pickup. (The original pup was a D'Armond, also a single coil... seen mostly in Gretsch's these days). Without this pedal my guitar is like a radio antenna. It's only playable if I face in one exact direction. With the pedal enabled 98 percent of the hum is gone regardless of the guitar's orientation. For me, this pedal is a game changer.

I considered purchasing a different pedal that costs 3X but opted to go with this less expansive option. If it didn't work out I knew that I would not have any trouble returning it to Sweetwater. So I took a chance and it worked!!!

This is not a NOISE GATE. I tried using a noise gate and got varying results but the quality of the tone was compromised. I don't really know how this pedal works, but it does the job, so I guess it's MAGIC. Plus, there's very few options on this pedal. It's either on or off. There is a "normal" and "strong" switch... I just leave it in the normal mode.

Now I can focus on PLAYING and enjoy my guitar's bell like tones.

This is great, eliminates probably 95% or more of the noise I was getting through my single coil/ Strats and p90 pups, it's a game changer for me and is much simpler to operate,, I had the boss noise suppressor and just couldn't get it to work right, I'm going from my guitar to the humdebugger tthe rest of my pedals to my Princeton, highly recommended

This unit creates a pinging sound. It makes your guitar sound like a Dalek from Doctor Who. I contacted Customer Service at EHX, and they said this is normal. I can't understand how they can sell such a product, knowing that it is unusable.

Yeah, this unit does eliminate the hum, but the way it makes my guitar sound like a robot voice makes the product unusable.

Big waste of money. I feel really guilty about selling this thing second-hand. I'm gonna get really bad karma if I sell this to someone.

I have Single coil pick up that hums pretty bad tried another product which was a noise gate ! It didn't work for me. My sales engineer Alan suggested I try Electro -harmonix Hum Debugger it uses a different type of noise suppressor I believe! It worked took the single coil hum out with out changing the tone as far as I'm concerned, I would recommend this pedal for annoying single coil hum ! I'm very happy with it ! Thanks Alan

This thing works really well if you're trying to eliminate the background hum from a single-coil pickup. I play a Larrivee Baker-T pro which has hotrod pickups, and even with fairly heavy distortion this pedal takes care of the hum (esp. when not playing) without sacrificing tone. I'm happy with it & recommend to anyone looking to take the hum out.

This pedal works, I have 2 guitars with P90'S and the pedal has silenced the noise. I play Jazz, I do not use pedals just a splash of reverb. I don't hear any altered sound from using this pedal, either loud or low. Worth it.Gary.

I play through a 15W Fender Bassbreaker. It's a notoriously noisy tube amp. My house was built in 1947, so the wiring is old. But even on grounded lines, the hum was almost louder than the guitar. This took away a good 99% of the noise. I did notice a glassy, treble color to my tone, but reducing treble settings on the amp and pedals, a little additional help from a cheap EQ pedal, and that is mitigated. Couldn't be happier.

I've wasted so much money on this product. I bought 2 of them. One of them broke - or at least I think it broke. But it could be the power supply. But since this product uses a unique power supply it doesn't work with any of my other pedal supplies or adapters. Like - why?? And there's nothing I can do but send it in for an expensive repair.

The 2nd one works well but again - because of this proprietary adapter you need to have be sure you have the power supply with you at all times instead of just using a pedalboard power supply. Again - WHY??? If you work in a recording studio, you have a pile of these adapters and of course it's impossible to find this specific one when you need it.

This has soured me on all Electro-harmonix products and I'll never buy them again.

This pedal is the difference between me, enjoying playing my Stratocaster through a tube amp and not. But I just want to call out that this is a digital pedal and will add some slight latency and loads of digital EQ/notch filters to the signal. The normal mode, while definitely sounding different than without the pedal engaged, is still usable. However, the strong mode is mostly unusable in my opinion. The sound is gutted and very phase-y from the absurd number of notch filters cutting out both odd and even harmonics. The power supply is part of the circuit and how the pedal knows what hum signal needs to be filtered, thus battery powering things not an option.

Izotope's de-hum can run on your laptop's batter, and with near zero latency, filter out the hum in an even more transparent way than this pedal if you're debating whether you need this pedal

There is nothing left to the imagination with this pedal's function. And, it does it very well. The controls are simple. There's a toggle for either "Strong" or "Normal" effect. A footswitch activates the utility.
I use the Electro-Harmonix "Hum Debugger" in two ways. The first is to eliminate hum from a pedal chain to my amplifier where no discernable ground loop exists. The second is in a mixer's effects loop with buzzy electronics regardless of gain setting. The "Normal" setting takes care of most hum instances in either case. Both settings eliminate hum with transparency providing a nice straight signal. There's neither gating nor discernable tonal compromise.
The Hum Debugger proved a valuable utility in my home studio.

So I mostly play ambient and dreamy /loopy type guitar music, and I really found that the buzz from my strat or tele would really start to build up over successive loops and became really noticable, and annoying! This stops that. As well as any appreciable buzz from those aforementioned single coils. Of course we have all been battling with that nuisance in the studio our whole lives, so this seems invaluable there as well. Would be 5 stars but for two small caveats. 1)kinda pricey really for a pedal that I'm not sure every guitarist really needs. Kinda depends on your style.
2) I hate the actual switch on ehx pedals. So loud and clicky. I am going to leave this on all the time so it doesn't really matter, but be aware. My ehx bug muff switch is really clicky too so I think it's just how they are. Boo.

While I have only used this unit twice so far, I am pleased with my purchase. Finally! the ballads are not ruined by a buzzing guitar player. As well, we had a guest player one week and he went straight into a DI box from his pedals, It did not remove all of the noise from the DI, but it took a totally unusable guitar sound and made it work well enough, it was just fine on the live and the streaming mix. I had watched the YouTube videos on the Hum Debugger, and it convinced me to give it a try. You may notice as I did, the harmonics are slightly diminished when the unit is switched on, maybe a little more tone to compensate? I'll have to experiment in the studio and see, but overall this is a game changer. The guitar player wanted to buy it from me, but I told him to go to Robert Koch at Sweetwater like I always do, great team.

I bought this to remove hum from my Fender guitars with single coil pickups (Jazzmaster, Strat, Tele) and Gibson P-90s (Les Paul Special). Works flawlessly in every case. No need to swap out my pickups for him cancelling ones! I tried it on humbuckers too (Les Oaul Standard) and even though they don't produce much hum, this pedal still eliminates what hum there is. It works exactly as intended.

We bought a new house and I finally got a studio space, I was so excited! But it turns out, the HVAC unit immediately behind the wall of the studio space causes my single coils to hum so badly I couldn't even record with them. I considered trying shielding, but that seemed like such a hassle for no guarantee it would even work, then I stumbled across this pedal and thought I'd give it a shot. It does a fantastic job! It cuts out the vast majority of single coil hum without changing my tone. I'm so happy with it that I've added to my rig permanently when I'm using single coil guitars. I play in a band and also a worship service. The type of lights would cause my single coils to hum at church, so I brought this and tried it and was so pleased with how well it worked. Long story short, it does exactly what it says it's going to do - it gets rid of annoying hum. I highly recommend this pedal of you play single coils, it's been a game changer for me.

Completely eliminated all hum, I am totally satisfied, hope your results are as good as mine.

For some reason, I have major buzzing issues at the house I bought last year. Power company and electricians have been out with no luck at diagnosing it. I think it's EMI in the air being spit out by the transformer 10 feet from my house on the pole. But whatever. I have a buzzing issue, that's the point, and it only happens here at my house. If I take my amp guitar to gigs or to other houses it's dead quiet noise-wise. It's annoying to not be able to play at your own house because the buzzing is so loud it prevents any type of dynamic range in your playing. Noise gates are basically useless with buzzing of this level because you lose the ability to roll your guitar volume off, otherwise it gets gated out.

This pedal is like magic. There is still some buzz in the higher frequencies, but you can easily talk over it. See the linked video for the difference. Keep in mind, I'm dealing with a monstrous buzz.

One thing of note is that while this pedal is great for curing the symptoms, I still have an underlying problem that needs to be addressed as it could potentially be causing damage to my amp in the long run.

TL;DR I've dealt with a lot of buzz but what I have at my house is the worst I've experienced. This pedal pretty much solves it. You lose a little sustain in the process, but it's a trade-off I'm willing to make to be able to once again play at my home.

Adds a quick and bad slap back delay that is always on and colors your sound in an undesirable way. You will know in a few seconds that this thing is worthless. What it does colors your sound more than the noise it supresses.

I'm using the correct power supply plugged into the same socket as my amp and pedal board. The Hum Debugger does get rid of the 60Hz hum..... and adds an annoying hiss at the same volume as the hum. This happens on either setting and whether the Debugger is plugged in to the front of the pedal board or the end. I'm using it on a single-coil bass with only the slightest hint of overdrive. I'd expect this would be the easiest case for the Debugger to fix. It failed. I plan on returning this since I have a choice of hiss or hum and decided to take the noise that costs $ less.

I wrote in my first review that I am using this last in my chain (yes, exactly opposite to instructions to plug guitar straight into it and everything comes after) because I have a few "vintage inspired" pedals that I know that the Hum Debugger will mess up. For the purpose of assurance and clarity, I tried it first anyway. I was right, the fuzz and the vibe pedal will not tolerate it. I read somewhere online that another user of this pedal, after months of trying in multiple places in the signal chain, had decided that it works great anywhere that makes sense to your specific rig and needs. Then I decided to try it right after the sensitive and ornery pedals to see if maybe the Hum Debugger would still be more effective as close to the beginning of the chain as possible (instead of very first or very last). For whatever reason, I actually really disliked it that way. It was indistinguishable from how it sounds last in the chain with clean sounds, but with any boost (and more so higher gain), it actually sounds worse to me after the gain pedals. Pushing the gain on the processed signal had noticeable artifacts and some high end loss, but sending the higher gain signals to be processing has a little high end loss, but MUCH less weirdness. I would be a liar if I said that there was NO change in the sound besides the wonderful absence of the hum, there is some loss of highs, and a very small affect that I can best describe as like the smallest possible micro-shift affect. Almost like the most subtle "doubler" sound. Tonight will be the first time I will be using it in a full band setting, so hopefully I won't have any unpleasant surprises. I actually think that even the few small "problems" of slight tonal loss and this other weird sound will be noticed even less in the context of a full band. And I can bet that I will be the only one to notice it at all (not likely that a band mate will notice, and certainly no listener will know). This product is going to free my guitar choices and my beloved single coils will have their glory again.

I have been searching the internet and the universe for a solution like this for a long time, and somehow it took me this long to try this one! In addition to being a performer, I have been running a small studio for over 10 years, and have always wanted a similar noise/hum reduction solution to what I use in my DAW work. I have 2 or 3 plugins that all can do similar things with creating what is called a "noise profile", then either filtering out those frequencies or flipping the phase on the profile. Depending on the frequencies and where they sit in the mix (individual track vs whole mix, frequencies that include or don't include the sound that I am also trying to keep, etc), these can work really well in the right situation. I have always wondered why this type of thing doesn't exist for a live need, especially for the classic 60 cycle hum from single coil guitars.

I have only spent about 15 minutes with this (it JUST arrived and I couldn't wait. It's my birthday today, too!), but it only took me about 10 seconds after hooking it up to know that it works REALLY well. I have semi-"dirty" electricity in my home, and plugged in my most favorite (and noisiest) of all of my guitars. I turned on 2 gain pedals and kept the guitar on a single pickup (noisiest of the noisiest). And for the record, I put it in the opposite place the directions suggest. It is recommended to put it first, but I have a few vintage-inspired pedals that I already know will be messed up by this pedal, so I decided to not even experiment yet with it between random pedals and put it last. I was hoping that it would work there so that I don't need to put it on my actual board, and can instead set it up on top of the amp. It's not something that I will need to turn on and off during any show or jam since if the room is noisy, the room will be noisy and the pedal will be needed or not. I suppose I would turn it off if I actually use a humbucker guitar, but honestly, I usually only use one in specific recording situations, a specific gig that I would likely use it for the whole gig anyway, or if the room is noisy and I just can't use single coils. And the last scenario seems to be happening more and more lately. I assume that either places are not being maintained, or the RF interference has gotten so bad. Hard to say, but I know that more than half of my use of humbucker guitars live are solely because I am forced to due to noise (I am a single coil nerd).

I read that some people experience dramatic tonal loss with this engaged. I noticed a tiny high end roll off, but I even did a quick recording, and the difference is noticeable, but not at all alarming, unpleasant, or unfixable. I am truly surprised, blown away, and in awe of how well this works. I even tested it with my over-the-top fuzz, maxed out to fuzz levels that I don't even use. Standing 4 feet from the amp, with the neck Tele pickup only, noise so loud I wouldn't even use the fuzz with this guitar live in a quieter room, and when the pedal engaged, it was almost like a noise gate except that I could hear the slight hiss of a high gain guitar about to explode. But no hum. This is the best voodoo ever!

The Electro Harmonix Hum Debugger is a highly effective solution for eliminating unwanted hum from single coil pickups, such as those found in P-90s and Telecasters. As someone who uses it to overcome hum in a basement with poor wiring, I can attest to its ability to significantly reduce or even completely eliminate hum in my signal chain. I already use a power conditioner, so note that this is a multi-level issue for some folks, but the EHX totally works. I have almost never used the higher setting.

In terms of sound quality, the Hum Debugger is highly transparent and does not color the tone of your instrument. It effectively filters out unwanted hum while preserving the clarity and dynamics of your guitar's sound.

Overall, the Electro Harmonix Hum Debugger is a highly recommended solution for anyone dealing with unwanted hum in their signal chain, especially in environments with poor wiring or high levels of electrical interference. Its effectiveness, simplicity, and transparent sound quality make it an essential tool for any guitarist or bassist looking to achieve a clean and noise-free signal.

One important thing to note when using the Electro Harmonix Humdebugger is that it requires the use of the power supply that comes with it. While it may be tempting to use a generic power supply or daisy-chain it with other pedals, EHX says that doing so can compromise its performance and effectiveness in eliminating unwanted hum.

I like it so much that I even bought a second unit for my son who is off at school to help him overcome his dorm room recording issues with his Stratocaster and Jazzmaster. This thing just works.

I recently moved into an apartment full of LED lights with dimmer switches and a high-voltage power line only a foot away from my rear window. As a result, all of my guitars with single-coil pickups were humming so loudly that they were unplayable. Like many of the other reviewers, I tried so-called power conditioners (to no effect) and noise gates (choked the signal and sustain) before deciding on this solution. The good news is, it works surprisingly well. How well it works depends on the pickups I have in my guitar and how much gain I'm using. With humbucking or noiseless pickups and a clean tone, my amp (a Katana 100) is so quiet when I'm not playing that I can't tell by listening that the amp is on. Better yet, the HumDeBugger has no audible effect on my tone. At the opposite extreme, if I play a guitar with single-coils through a noisy old Vox Pathfinder 15R set to medium-to-high gain (or through overdrive pedals), then the hum, buzzes, and pops are quite audible -- although much quieter than they would be without the HumDebugger. Fortunately for me, I'm not a high-gain player and I wasn't expecting miracles, so the HumDebugger is now a standard part of my signal chain.

This is the second Hum Debugger I have purchased. For any multiple effects board set-up, this one device is essential to remove 100% of noise. Whether the noise is from the picks, the effects, or the power supply, this gadget eliminates them all without coloring the tone of your instrument. Unlike typical noisegates, there is zero loss of natural sustain either. I have not found any other device that accomplishes all of the above.

I get terrible EMI hum on my guitar. And with floating pickups, shielding was out of the question. Noise suppressors and noise gates sucked all of the nuance out of my fingerstyle jazz guitar playing. The Hum Debugger conclusively solves all of the issues. It's fundamentally different from a traditional noise gate. It doesn't try and hide the noise like those other pedals (which is sometimes useful if, say, you have really hot pickups and want to reduce handling noise and such. They're not inherently bad - just not suitable for my purpose). Instead, it actually cancels the noise while ignoring the actual guitar signal. It's pretty clever. In short, it completely eliminated my hum from every playing position and does not appear to have any impact on my tone, attack, or release.

Neither NG seems
To work well. One does aOK. But there is a hum always there. This eliminates that completely. I've been trying to do same over 3 decades. Not sure if I'm sacrificing towns. So far, so good.

High quality in the custom service also in the gear!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

This pedal does a great job of eliminating single coil hum in the 1st, 3rd and 5th positions. However, it does make the tone a little brighter and introduces a metallic reverb sound. I adjusted my EQ and turn off my reverb when I used this pedal. I still would recommend it but users need to be aware of the impact on tone.

I had a nasty hum in my little rig that persisted whether I was using humbuckers or P90. Most of the reviews mention how it helped with single coil noise so I was skeptical it would help me.

I have an old house with dirty power/grounding issues. I bought a Furman power conditioner (no change) Boss NS-2 (helps a little) Ebtech Hum Eliminator (fail) and finally the EHX Hum Debugger. It hasn't completely eliminated the hum but reduced it enough to where I've stopped worrying about it (for the most part). Good product.

Here's the deal, it's not perfect. It definitely imparts some weirdness to the guitar signal. In a totally quiet room, playing by myself, there are some odd sub-low end artifacts, and what seems like a barely perceptible delay. On certain notes, there is also a barely perceptible modulation. I don't think most people would catch it unless they were specifically looking for it. It's not obvious at all. I have ears like a bat. It's a blessing and a curse. I don't want what I hear to steer people away from this, however. Because I'm 100% positive none of this can be heard in a mix with a whole band playing. I know because I use it all the time.

I have one gig in particular that happens in a very old building with extremely crappy power, loads of neon, gaming machines, ceiling fans, and everything else. I previously only played my humbucker guitars in this venue. Single coils were totally impossible. The last two times I've played there I've brought my Strat and my Silver Sky, plugged into the Hum Debugger, and had no issues. It's still a little noisy, but it's DRASTICALLY reduced and totally workable. Again, nothing you can hear when the whole band is playing. Completely manageable. It's a game changer if you like single coils and play in dive bars.

The Electroharmonix Hum Debugger performs exactly as I had hoped. While not required on most of my guitars, there are a couple that create the infamous 60 cycle hum. This pedal eliminates that type of irritating noise without degrading the sound quality of the instrument. It is money well spent.

I was very surprised at how well this actually works. I can't recommend it enough

I love my new Guild Stratford with the three P90s ,but with the heavy amount of gain
I like to use on that style guitar, the buzz was just unbearable. I engage this box and I
hear the great tone of the guitar, but no noisy hum. I can use a compressor, overdrive
and distortion or fuzz without any issues. As far I know, this is the only Hum remover
available in a pedal and IT'S GREAT. There are many really cool single coil guitars,
Strats, Tele's, Dano's , and the awesome Silvertones. If you like med-high gain with any
of these style guitars, you'll need this pedal.

I agree with all of the rave reviews. This is inspiring me to pick up more single coil guitars because there is nothing
like a great sounding pure single coil. MOJOTONE quiet coils are very good and very close but this pedal really works to
eliminate and remove single coil hum while maintaining all of your dynamics and sustain with very little effect on your original
tone. Noise gates and noise suppressors are just not as good as this noise remover. It's great.

Just like in a horror movie the noise haunting my guitars was INSIDE THE HOUSE! 2 prong outlets were the gates to the hell of... well, hum is too nice a word for it. Well, no more! Take THAT you humgobblins! This pedal now travels with my gear, because ya never know what lurks in wiring...

Steven Steward was very honest and cautious in recommending this because noise issues are complex, so I was beyond overjoyed when it worked!

On the highest gain settings there is a little breakthrough buzz but nothing I can't live with. Before this I was limited to clean, and now I'm in a new kind of danger because I can have me sum pedal$ LOL

I have a lot of Strat-style guitars with single coil pickups on them. The HumDebugger does what the name says, it cuts the hum and does it without destroying your tone. Using a Strat into my EVH 5150 III EL34 amp was Noise-City until the HumDebugger came along. It's still noisy but not as much hum.

A clever pedal from EHX

Good Music to You!

the hum debugger works great ,turn it on the hum is gone,great peddle.

I have this between a G&L S500 Tribute and Deville 410. Killing the hum is phenomenal, but to my ears it gives a mid boost. I've never been a fan of that tone. To me it sounds strangled. Using the bass and treble controls on the amp helps balance things out and taking out the mids from the amp let's the Hum Debugger maintain the mids on its own.

This is a good unit. Developed for playing live, it's very simple and effective in reducing the hum from your rig when gigging. My band mates appreciate it too. I might go with a more integrated rack mount unit for high-end recording, but for live this is a good one.

My .02.

It changes your tone but I think depending on your amp setup you're more or less likely to notice it. Your tone sounds brighter whether that's from added top end or the loss of a bit of mids during the filtering.

Where I think this pedal probably has the most utility is playing loud and relatively clean with a style of music that has the space in it, e.g. lots of slow arpeggio where the tail of the notes might not be covering up the noise. If it's single coil buzz you're dealing with -- probably why many folks get this -- then it would normally become increasingly more noticeable as you bring up the noise floor, i.e. turning up the master and playing in a live situation. This pedal will wipe out just about any chance of hearing any of that noise while playing this style of music. Again though, you sacrifice *some* tone but if you EQ *with* pedal you can probably compensate to some degree.

Where I don't think pedal is the best fit is where something that a gate does just as good but without compromising tone. If you're playing loud *and* heavier rock and looking to mostly knock out noise between songs when not playing and during short staccato type stops with pauses between, e.g. palm muting, then I personally think a gate is a better option. It can knock out the noise in these situations without sacrificing tone. Think BOSS NS-2. Gates only become problematic to some degree if you have long tailing notes like mentioned above -- closing sooner than you'd like, trails sometimes sound a bit artificial, etc.

Such a simple, straightforward solution to a bad problem. No learning curve or adjustments to fool with. Just hook it up. Stomp on the switch and done.

When I was researching, the major complaint people had is they thought it changed their tone. May I suggest that the awful hum and line distortion was what was changing the tone. This pedal actual eliminates the thing that was messing with the tone.

Another benefit is the cleaner signal in seems to make my in-line tuner and other pedals function better. For sure!

This really makes things quiet, no buzz, no hum, only when playing is there sound. I like it so much I bought two of them.

Works good for me, eliminates about 90% of the humming

It cleared out guitar noise 100%.
After this I stopped using my boss ns2

Very effective product, eliminated the hum from my Jim Adkins Fender Seymour Duncan P90"s when hooked up to my Fender Champion 40 Amp. Great product. You do have to purchase "Guitar Patch" cables as product only comes with a power chord. Your guitar cable plugs into the side of the Hum Debugger and the guitar patch from the other side to the amp.M

I have really bad 60 cycle hum in my house. Probably because my house is over 40 years old. Plugged in the Hum Debugger and the hum immediately disappeared with no appreciable change in my Strat's tone. Excellent product that works as advertised, which is becoming rarer and rarer these days. Sweetwater's customer service was excellent as well. They called me the same day I ordered the box and let me know it would be shipping that day. I received the box the next morning. This is how customer service should be done.

I was a bit skeptical when I ordered the Hum Debugger, I had tried several other options to cure the hum in my guitars in my small space . I open the box plugged it in and to my amazement it actually removed the massive about of hum I was getting. I have to say it does alter the tone somewhat and can add a metallic after tone depending on the type sound your going for but it did cure the noise enough where I can record some guitar in my space instead of going into the garage or another place in the house.

Works great for clean. High gain - kils the 60 cycle but: there is a definite clangy "in a tin can" kind of tone especially noticeable when you are palm muting. If you are playing live in a band, it would only be noticed by you and maybe a few guitar players in the crowd. I would not recommend for recording with a high gain sound.

I played humbucker pickups for years. Nothing BUT humbuckers. So when my ears shifted toward Fender Teles and Strats and the single coil sound, my pedal board suddenly had a new sound....HUM. Not just hum, but sometimes unattractive levels of sheer noise. I tried a noise gate, but nothing affordable switched in/out without me hearing it. I spoke to Norb, my Sweetwater specialist, and he suggested this. I had read about it before but had forgotten about its existence, so I had Norb send it to me.

I'm gonna digress for a second here. I had, about 3 weeks before ordering this, made my first Sweetwater transaction. I did it online, applied for the financing, and got my product as expected. But somewhere along the way, this guy Norb starts emailing me about my order. Then, a week after I got my product, he calls me. A few weeks later, he checks in again to see how things are going.

I spent over $30,000 at a national retail chain before coming to Sweetwater. One time I was at that chain and some of the guys were on the phone. Turns out they were calling their VIP clients for a sale. I asked what constituted a VIP client and I was told "$10,000 + in sales". I had one of them look me up in their system. I had lived in several states, so he had to look at a few addresses. By the time he hit $20K, he still had more accounts with my name on it to go. I never received a VIP call. Not once.

Norb, I hear from him every time. After I order, during the shipping process, after the sale. I can ask questions and get answers. Sometimes he just calls to see how everything is going. It's sales 101, but nobody does 101 anywhere anymore. And he makes good suggestions. I have picked up a couple of things because of his input. I wanted to give some props where they were due.

Back to the product...

I read some articles about slight tonal difference, etc. I'm gonna say it exists, but man you're being picky if you think if makes that much of a difference to the tone. The HUM, however, is gone! If you're doing a Rick Beato level of record/switch/record/play/listen...yeah, slight tonal change. If you're playing in a band and you're one of even just a trio of instruments, no...no one is going to be able to tell.

This thing has one job and does it.

I was having a terrible hum when I was playing at my church with my Michael Kelly Hybrid. I'm sure it was all the usually light cannisters and ground problems coming from the transformers. At any rate I first tried it out at my apartment which had little to no hum. I was concerned at that point until I unplugged my guitar which would create a huge hum due to lack of connection. When I turned the De-hummer on I was totally blown away. No hum. Of coarse I touched the plug end I had a huge hum which proves the point it's not a gate anything that would sacrifice the tone. It cuts down or completely eliminate the hum for guitars with single coil or grounds that are bad in the power recepticle. Before I bought this I went through my pedalboard with a "fine tooth comb." I would suggest this before buying any device of this nature because you might have problem other than your instrument. Find the source then purchase. This totally fixed my issue and I am totally pleased. Thanks Sweatwater for your help and willingness to help.
Oh connected my guitar in the De-hummer. It is the first in my chain of effects.
My guitar has a push pull for enabling single coil on my Semour Duncan Humbuckers.
Hope this helps someone.

Does exactly what it says it does. Does it add a weird color to your sound? Yes, but the buzz is GONE and since I run 2 amps at once, the tone change is not even noticeable.(to me) I only notice when I run dry for recordings. But it works like a champ in live sitiations.

I have a number of Fender guitars and this not only eliminates the hum but does not effect my tone either. Pure magic!!!!!

My house was built in 1965 and I have long suffered with hum and hiss from my amplifiers. Tried all different filters, plug adapters, etc, etc. Decided to give this a try and finally silence when I am not playing. It really works. Give it a try.

If you’ve determined that it’s your single coil pickups that’s creating hum & buzz at your amp, this is a great solution. But do some troubleshooting first. Temporarily install a ground lift plug adapter to see if the hum goes away. If so, you have a ground loop or line-born interference that this box won’t fix. But if you amp runs clean until you plug in your guitar that’s picking up electrical interference through the single coil or P90 pickups, this box works wonders. Do you find you have to stand in a certain position to get your guitar to quiet down? This box solves that.

Some people complain this device colors their sound. It does, very slightly, but it’s far less intrusive hand hums and buzz or a noise gate that chops off your sustain to mask the problem.

The Normal setting was fine for my use, killing the hum from the big single coil pickup on my E9 S10 Dekley pedal steel guitar. For pedal steel we use the volume pedal for volume swells and to increase sustain on held notes or chords. Now I can use the full pedal travel and there’s no noise.

Highly recommended.

One additional oddity, with my setup all the gear is plugged into one Tripp Lite power strip. I found that the Hum Debugger needed to be plugged directly into the house power as described in my first review. A new wrinkle is that sometimes I need to remove power from the EHX for a moment to get it to latch. Not every time but once I do this with everything else powered up, it latches and works fine for the early and late morning worship services. My best guess is that micro processor needs to read the power in a certain way and if I power up things out of order it goes "tilt".

At home, I can play a single coil without out any hum. It's just as quiet as my humbuckers. When I play the same single coil at church, it hums terribly. I've tried everything and nothing worked. The EHX Hum Debugger was the solution. For anyone worried about tone suck, just toggle it on and off as needed between songs. I did however experience something that I'd like to share. My whole rig is plugged into a Tripp Lite power strip. It has some EFI and isolation filtering going on and if the wall wart for the Debugger was plugged in, it wouldn't pass signal when engaged. Once I plugged it into the house power direct on the wall plate, it worked. My best guess is that the filtering in the power strip was denying the Debugger the information it needed to work. At first I thought it was my wireless transmitter/receiver. Then I tried bypassing the board and plug direct into the amp. In bypass signal passed, when I stomped it went quite. The power strip was the culprit.

This thing is magic. I own every hum eliminater buzz be gone ground lifting noise cancelling device out there. this does something different. IT STOPS THE NOISE. Period. I don't know how but this is amazing.

Seriously

For single coil and especially P-90 users all I can say is you need this pedal! I'm really surprised these aren't flying off the shelf. First off, let me say this is NOT a noise gate, I was using a Silencer and it just was not cutting it, this pedal does exactly what it says it does, eliminates hum, period. I'm a big fan of P-90 pickups and I use a pretty high gain amp (Bogner 20th Anniversary Shiva equipped with EL-34 tubes.) and I play loud with lots of gain, this pedal mitigates any noise, no longer do I have to find the sweet spot to stand.

Do yourself a favor and check the Hum DeBugger out, you won't be disappointed!

As others have mentioned, this will NOT work with P90s in high gain. It will sound like you are playing in a tin room. Works great with my strats though.

One place in particular I play very old buildings with bad power. I had horrible ground loop hum and buzz when I would crank up the volume after engaging this pedal the noise was completely gone. Freaking love this thing!!

Got 60hz hum - this will kill it. Simple but effective!
Note, it kills hum, not amp hiss. I noticed no difference between in line or in fx loop.
No tone coloration (that I could notice) either.
Why not 5 stars - 7.5V power supply. While not currently giving me grief, when I upgrade to a pedal board with on board power supply, I'm going to need something with a 120V pass through.

Holy Smokes!!! This thing just does it! I didn't think I could ever defeat the horrible buzz through my amps in my home studio. My house is old and small. My amps have buzzed for years and I could not mic a cabinet. PROBLEM SOLVED!!! Just buy one!!!

probably good for a crowded long gig where you're drinking a lot and don't need that hum going on between numbers. However, in quieter settings it changes the tone/feel of the instrument in a more than subtle way and on the "strong" setting, there is an unpleasant, rapid, digital delay, soft flutter sound following any abrupt stops in your playing...totally removing the original crunch. That stuff matters.

Very surprised how well it works and how transparent it is in use. The things that preceeded it would reduce hum but color things a lot. I have tried it in all the typical hum and noise fields from hell, amusingly enough the worst being church sanctuaries. Uusally horrific wiring and they want you to be quiet sometimes. Worship leader declared it made the guitar signal quietest he had encountered in more than a decade. Sound quality and expressive playing opens up without having to gate the guitar input so heavily. Worthy purchase for a single coil pickup lover. Strats can now use positions 1,3, and 5!

I'm not using it for recording but in our shows and in our practice space this baby is exactly what I needed. For years this wouldn't have even crossed my mine. All my guitars have always been humbucker style. But this year a got a wild hair and found the SG I've wanted for years. Bat wing pick guard, trapezoid fret inlays, and rocking the P-90s. I played a friends SG back in the 70s that had of been from the 60's. It had a single P-90 on it and the sounds he got in our bands blew me away. Every since then I've wanted to get one that had two P-90's. Well this guitar sounded just like I had thought in my head. But our main practice space has really bad ground loop problems and it hums all the time. I got good at using the volume pedal to please everyone else's in ear sounds. But would forget from time to time. Well I just bought a Jimi Hendrix Fender Strat and just knew it would make matters worse. So I ordered one of these after reading reviews and knowing I wasn't going to use it for recording. Lets just say I don't have to jump on the volume pedal anymore as the song ends or use noise gates that just cut off your signal. I can usually play with it in the normal setting but if I have a higher gain signal I will pump it up to strong. Cheap investment to keep peace in the band and sound better. I even use it upstairs when I work on my Helix patches on my computer and it still performs perfect. Have some hum in you life you would like to get rid of buy one and be happy.

Now, what can I say about this baby? It saved my Mosrite's electrical playing profile. Guitars with single-coil pickups have an inherent problem with outside noise and 60 HZ. Hum. This Hum DeBugger gets rid of 99% of all that noise and hum. And although there is that 1% of noise that still gets through, it is very tolerable. I am just so happy!

Just got this pedal. I love single coil pickups and there are many dimmers in my house both of which can cause some nasty buzz. Had tried a couple different noise gates but they all seemed to abruptly cut off sustain and allowed the unwanted noise back in when I started to play. Ive tried noiseless coils too but they seemed kind of so-so (Vintage Noiseless for my Tele and Hot Noiseless for my Strat). I decided to give this a try and I knew that if I didn't like it that Sweetwater would take it back without any issues.

I plugged this pedal in and turned on and the buzz went away just like that. I have tried it with multiple guitars (2 Strats, 1 Tele, and 1 SG) and it works with all of them. I usually just need the normal setting but if I have many nearby dimmers on and or any combination of high gain overdrive (from one of my amps or a pedal) or a compressor I sometimes need the strong setting which takes care of it. I have not noticed any change in tone- if there is its minimal. I may eventually install the Ilitch noise reduction system into a couple of my guitars (because I obsess) but in the meantime this is a relatively inexpensive, easy alternative. I would recommend it.

I bought this a few years ago to use with my G&L S-500 through a HotRod DeVille 410 and still believe it should be sold with ALL single coil guitars. I'm not a big fan of the mid boost it causes, but some may like it. I prefer a more open, clear and natural sound, but killing the 60Hz hum is the reason this pedal is so important to my sound. Whether I want to admit it or not, the mid boost does help me with a more classic sound.

I've got an Affinity Strat and have been trying for some time to eliminate the hum (yes, I know single coil pickups hum) and this little gadget did the job.

I have six guitars with either P90 or Single Coil pickups and the hum (especially on a '55 Les Paul Special) was truly annoying. Now? With this pedal? Stone silent! I'm kicking myself for not buying one sooner. Totally worth the money.

On the recommendation of Keith Kilkas I bought one and it works as advertised. I use a hybrid pedal set up and a home-built LP double cut with DiDmarzio P90s. 60Hz hum has been a problem until now. I would however like a smaller foot print and 9v power.

So far it really works with my home guitar rig!! No more shielding or other jerry rig messy stuff to kill 60 cycle hum!!! I have tried both hum and single coil pups and so far so good with my little kustom amp ! I well put it to the test of a half stack and other humming ear killers. Thanks

okay..so all is going well till you hit that 50yo hall with ancient wiring that runs under the stage! Now what? 20000 watts of crystal clear buzz! Enter the Hum Debugger...your sound engineer will be buying you shots after the gig! Just be aware that this baby uses a dedicated ac power supply so order a backup in case of failure.... yes it happens.......Keith Jones

It was howling in playing position and quiet when tipped vertical. Now complete silence on the low setting, with no detected tone or volume loss.

One person said they heard a "slapback echo". Another said it destroyed the tone. Are you kidding? All I hear is NOTHING - except my Rickenbacker. No hum. NO HUM. And nothing else is changed.

I own a 360/12 Rickenbacker and I love it but the hum was very noisy in my amp. I just got this Hum-Debugger after talking with Ryan at Sweetwater regarding the best unit to deal with the hum so after his suggestion I ordered it & plugged it in last night. Wow! what a difference. I turned it way up to get the full hum effect knowing it will never be that loud but when I clicked it on (make sure you put it before the effects) it was silent!!! I will say a slight hiss remains because of volume & my treble knob was around 8 but it is far better and way doable! If you are dealing with hum this thing is the bomb!! I suggest this for anyone tired of that bothersome hum!! I also ordered the Hum X but Etech to use for our outlets in our PA!!

It definitely silences the buzzing from pedal board and guitars. It does not silence or neutralize the hissing. It"s a keeper for me.

This miracle device eliminated 100% of the hum from my MIM tele. No hum. Zero. Total silence. Absolutely superb. Single coil users, this is for you.

I was experiencing an annoying buzz when playing live. Trying the ground lift switches on my pre-amp and direct box didn't do much. It was probably coming from the lights and was interfering with my single-coil pickups. The Hum Debugger did the trick. The buzz is gone.

I have a wonderful Seymore, Duncan SSL-5 bridge pickup on one of my Strats. It is an awesome pickup If used correctly, but it has one bad problem. It is quite noisy. In fact its the epitome of single coil noise. It has high gain but high noise.

Now I could do like David Gilmour and spend 200$ to get my Strat pickguard lined with copper foil and soundproofed, but the economical way is to get an Electro Harmonix Hum Debugger, It is very effective. The first time or 2 I used it, I could hear a slight reverb type sound, but now I've had it a while, I don't notice it like I did.

It kills the noise, and that's what I bought it for.

I used to have one of these that I used periodically in rooms where my bass pickups were subject to some generated noise. It didn't appear to be a grounding issue, more like radiated noise. I run a lot of high end on my bass tone, so I'm especially vulnerable to noise. This pedal worked like a champ. Then I loaned it to a guitar player one night to try and never got it back. He couldn't play without it once he tried it. So I just recently purchased another. I know that some have said it colored their sound, but I haven't noticed any tone coloration at all, and I have a pretty critical ear.

Just picked this up from Sweetwater and I love it. Couldn"t stand the single coil hum that I was getting with distortion. I use the Hun Debugger with a T C Sentry and WOW! Buy this pedal if your noise gate isn"t getting rid of all your hum. I can actually turn down my gate when I use the Hum Debugger. No more hum before the gate kicks in! No sound coloration noticed that others have mentioned.

I was worried about tone coloring, I was worried that it wouldn't work like it promised... But it does! Plugged it in, turned it on, hum was gone. Plain and simple. If you're on the fence, buy it. Once you plug it in, you'll be glad you did!

I am very impressed with this pedal, havent had to use the "strong" setting at all yet. Very little notice of any signal loss when engaged.

This item does what it says, it eliminates the hum. But with that it taints your tone, so much so, that it sounds like you are playing in a metal box. It has a very tinny sound to it. If you play live it's not enough for you to hear it through your amp. But in the studio or going straight to a DI Box it messes with your tone. If you want a quality hum killer, the Boss NS-1. It doesn't mess with your tone and it kills the unwanted hiss or noise with high gain OD's and pedals.

I am duly impressed. I play archtop electrics with the single neck pickup. Some have the single-coil floating type. This unit eliminated the hum, with no quality of sound compromise. I play in a particularly noisy (lights, grounds, etc) venue, and this is an absolute gem for me. I tried it through several amps, including DV, Fishman, and Roland. All with the same positive results. Worth the money.

I recently purchased a Les Paul with P90 pickups, and as much as I love the guitar, the hum from the pickups was unbearable. I needed a solution. I did a lot of research before I bought this pedal - I watched every video and read every review that I could find, and needless to say, this pedal gets mixed reviews. I took a chance on the Hum Debugger because I saw that people using it for P90's posted positive reviews, and if it didn't work for me, I knew I could send it back no problem.

I'm very happy to say that for my setup, - Les Paul with P90's, into an amp with clean sounds to mild overdrive, using the Normal setting - this pedal works flawlessly! And I am using it in a studio setting with NO perceptible difference in tone, except for the fact that all the horrible hum is GONE! Believe me, as a recording engineer, I am very critical when it comes to tone and audio in general and I would have sent this pedal back in a heartbeat.

As stated by others, if you are using a dry, high gain sound with the pedal in Strong mode, you are going to get some artifacts, especially noticeable if you are doing a lot of palm muting metal chugging techniques. Those players may want to look at other solutions.

Hope this is helpful.

The Hum Debugger completely screens out the dreaded 60 cycle hum from the single coil pups on my Strat and Tele. It does more than that, too. It helps filter out noise from neon lights. So I get quiet sound - I already use Line 6 products because the distortion models are quiet. This pedal is great.

This really works to virtually eliminate hum. I use a strat w/3 SC pups through a pedal board with various gain pedals, a vibe and a couple of delays. There is some very minor tone changes (not necessarily bad changes, just different), with it on but for live performance that is WAY more acceptable than the hum it eliminates. Highly recommended for anyone with hum problems, especially when playing live.

I have been living with a hum from all 3 of my bass guitars when I play at church. My 6 string guitars do not have a problem. I have tried 3 amps, 4 different outlets, 4 different cables, and another hum reducer product. I finally got used to having a dead sound dialed in to reduce the hum but it was not eliminated. Plugged this one in and I was blown away. No hum. Great sound again from my bass guitars. I have a Spector Euro 4, Ibanez SR805 and a Fender 5 string American Elite Jazz. All sound great now!

If your basement guitar heaven and full of florescent lighting and a bunch of computers and amps, you need to have the Hum Debugger. My single coils are fabulous at blasting out 60 cycle hum but this little wonder makes all of that go away. Now, all my neighbors hear is my bad playing! :D The Hum Debugger does a great job and it's so reasonable priced. You gotta have this!

The Pedal works good. That's is after I replaced one of the cables. The HumDebugger does clip some of the sound. But not real bad.

Does what it says it can do, transparent tone without single coil buzz. Must have for recording, great for stage and practice use. Can't live without it.

Short and sweet: this pedal couldn't possibly work better. I expected some noise reduction, but what it delivers is complete absence of any noise, without any artifacts like frequency notching or any impact on picking dynamics. Get one!

Bought this to try and eliminate hum from RFI not ground loop.....any guitar my amp...any location in the house.....it's uncanny how it completely eliminates the hum, regardless of the amount of amp or pedal gain. It does change the tone but I like the tone with or without the pedal engaged. I would bring this pedal with me and use it at the beginning of the signal chain if hum was a problem. Any change in tone is offset by the elimination of the hum.

I have been looking for a solution for months. Glad I found this. I plugged it in, switched it on, and it worked right away. No more Humming noise. I am using it with a Godin 5th Avenue + P90 pickup. The guitar sounds remains, only the noise gets trimmed off.

I play several single coil guitars, and the noise at gig volume is..well..distracting. This unit cleaned all that up and makes my single coil guitars as quiet s a humbucker. It is solidly built, and sturdy (I've dropped it twice cause I'm Clumsy). It is a sinple unit:plug in your instrument power up the unit and that's it.
If I have a complaint (and I don't, really)..it would be the power supply is not a standard 9 volt. I use szeveral effects pedals and it would be nice to add this to a daisy chain power uit, although THAT might negate the hum debugging...

Absolutely does what it's designed to do, which is eliminate the hum generated by single-coil pickups without messing with your tone- I am delighted!

I gotta admit, I was skeptical. Hum seems so inherent with single coils. And my amp (Fender Excelsior), though good, is very hum sensitive. There's also all sorts of hum-producing/-worsening stuff in the neighborhood. Plus, my old house is wired like a spaghetti museum. It's hum central, here.

But this thing works! The hum is just GONE. I didn't even need the strong setting. The normal does it all. I've never enjoyed my single-coil guitars so much. I haven't noticed any change in tone, either. There's plenty of space, bite, and attack room. Without the hum and with the tone intact, what you hear is the music YOU'RE playing. Worth every penny!

Thought the premise of it was good. It did eliminate the hum. Unfortunately it changes your sound. It made it sound like you had a chorus pedal running through it. Didn't like it. To bad because it's such a simple pedal.

So ya remember those TV commercials where some nasty lookin', multi armed bug was eating some food stuff and he thinks he'll be able to do this forever when a giant can of Raid shows up and him and his buddies all scream "RAID!!!!" at the same time and then (And this is important) they all disintegrate and disappear, usually in some sort of grave site.
That's very similar to what happens to the hum once you step on this pedal. Fantastic.

Dennis Konnecki recommended this Pedal to solve the Hum Issues I was having with certain guitars - The electro-harmonix Hum Debugger Hum Eliminator Pedal is the Perfect Pedal if you are having Hum Issues of any kind - Pure Tone - It Delivers No Sound Quality Issues - Enjoy!!!

Ok, as other reviewers have said, it does do a decent job at helping get rid of single coil hum- but at the cost of muffled tone and introducing metallic artifacts into your sound. Avoid this pedal entirely if you are using high gain- your tone with suffer, sound like its in a metal box and you will never completely eq it out. Check out the review by Eddie Bowers- its spot on, and you should listen because the guy designed one of the most incredible overdrive pedals ever, the Tonebrick Jawbreaker. Its safe to say the guy knows his pedals.....

I play a Fender Stratocaster/Telecaster through multiple amps in a relatively small room in the basement and this pedal did a great job of eliminating the hum from my single coils. From my standpoint it didn't alter my tone either. My only complaint is that it requires an AC outlet and can't be powered by my Voodoo L:abs power supply.

I play at a church where there are really noisy stage lights on dimmer switch circuits. My Stratocaster would hum and buzz something awful through my tube amp as soon as those lights were turned on. With the Hum Debugger on the normal setting nearly all of the line noise is eliminated, and I can play the guitar with enough gain to get a good sound. The only quirk I have noticed is that string noise is very loud, and just sliding my fingers on the strings makes a lot of noise with this unit turned on. Once I adjusted my playing style to avoid slurs and slides, the instrument was quiet. The notes ring naturally, and there does not appear to be any affect to the string attack and decay. This unit may not be compatible with someone who plays slide guitar. The unit could be ideal for anyone who plays guitar for theater productions, where stage lighting can even make a Gibson buzz and hum like a Fender.

I had several dimmer switches installed in my home with new lighting. All of the sudden I had a horrible screeching hum coming out of my amp whenever the guitar was plugged in. Improved when I touched the strings but hard to always be touching them. Unbearable noise even with humbucking pickups. Finally put 2 and 2 together and realized that the dimmers were the culprit. I had no idea this would happen when we put them in. The dimmers are really useful and we use them frequently so getting rid of them was not really an option. Found this handy gadget and it really works quite well. On the "normal" mode it makes the hum almost unnoticeable. I am just a hobbyist player and by no means a tone aficionado, but I notice no real difference in the tone on "normal". The "strong" setting eliminates the noise completely but something sounds a bit off to me on that setting. Overall I am quite pleased. It is not a magical fix but it solves 90+% of the problem which is enough to make me happy and I don't have to take out the dimmers.

Does exactly what it says, one click, no dials and no nonsense.

Yeah it eliminates hum, but it sounds like you a playing in a big metal box (a metallic slapback sound)
I'm just shocked when people give this a good review.
If you have decent ears you will not like this device.

The HumDebugger does eliminate the hum but it adds a metallic sounding echo to the sound. Live it is a necessity but in the studio you are better finding a place to stand that gets rid of the hum.
You can reduce the metallic sound a little with EQ but the echo is always there. If you can't get rid of the hum any other way then this will do it.Gary

Although, it wasn't exactly what I needed.

I feel like it deserves more stars- My neck pick-ups can be quite noisy and I'm usually forced to not engage them alone. With this pedal, that is no longer an issue. There is still more hum than I'd like, but perhaps I just needed a noise gate instead.

One whole star for it's simple design. That's pretty nice.

Let me be clear,

I play jazz with a Gibson ES175 with a single P90 single coil pickup.
Love the tone hate the 60hz hum. I go for a totally clean tone with no effects. The Hum Debugger got rid of all the hum on the normal setting. It works perfectly. My only complaint is for the price you pay they could have made it look a little nicer or at least slap a coat of paint on the ugly galvanized metal box. For you single coil pickup players this thing is a must. No tonal change using it at least to my ears playing clean tone jazz.

2 months ago I bought a Squire Jazz Master that I love, but in certain clubs I get a terrible buzz. One place all I hear is buzz and can't even hear a note from the guitar. 5 days ago I bought the E.H. Hum Debugger and last night I tried it at the place where my guitar was not usable. I plugged in as instructed and had that god awful buzz and could not hear the guitar. I stepped on the Hum Debugger switch, in normal setting, and the buzz was completely gone, with no perceptible loss of sound quality. Amazing. This thing is worth every penny and then some.

I bought this product to eliminate substantial hum from an electric guitar with single-pole pickups being used in our church band. I had read the other reviews prior to purchasing and while its a bit more expensive than I wanted to pay it definitely performs as promised. Hook it up, plug it in, push the button & the hum disappears. Worth the money for a clean sound! Haven't had it long so i can't speak to durability. BUT, I can say that the customer service and attention at Sweetwater is about the best you'll find. A rarity today!!!

I just bought a single coil Telecaster that had a lot of hum. The Hum Debugger took it completely away in each of the 3 positions, even with the treble knob at the highest setting. There was very miniscule (to my decent ear at least) impact on the tone/timbre of the guitar.

My next test was using it in Guitar Rig 5. For the cleaner amp settings, it works great. For the grungier, metal sounds, it dimishes the ambient sound, but definitely doesn't get rid of it. I don't play live, so it's not an issue, but would be if I did (unless you're looking for that type of messiness.)

I understand there is another noise reduction pedal that works for heavy metal applications, but not so good for cleaner sounds- can't remember the name.

It was suggested to me to change out the pickups and put in shielding- just wanted a simple solution- this one works great for my application.

Ever since I moved, I've had this noise, a kind of buzz/hiss/crackle that piggybacks on the tail of every note that comes from my guitar, making it impossible to play clean. This guitar's loaded with PAFs, by the way, so hum has never been an issue before.

I tried:

A. Removing my BOSS NS-2 from my pedalboard. (Ironically, this helped, but not enough.)

B. Removing pedals one by one till I ditched the pedalboard entirely. (Still noisy.)

C. Putting a HumX power conditioner (which has never failed me before) in front of my amp. (No dice.)

D. Using an ungrounded power cable. (Dangerous as heck and still completely ineffective.)

E. Going off the grid like a hippie and playing through a battery powered amp. (...And cussing up a storm when the darn noise was still there.)

F. Plugging directly into a Vox Amplug headphone practice amp emulator doodad to take even the cable out of the question. (Screamed in frustration; shook my fist at the heavens; traumatized the cat.)

I attempted this routine with about half a dozen different guitars before I realized I wasn't dealing with bad power, but rather a conflagration of bad electromagnetic and/or radio interference. Considering I've got a fire station on one side of me with all its radio gear, and a McDonalds across the street with godknowswhat kind of overpowered, dirty wireless drive through intercom, it's a small wonder my cat keeps popping out two headed kittens.

And so, desperate to be able to play without the accompanying sound of sizzling bacon under each note, I picked up this Hum Debugger, fully prepared to mope for days when it didn't do the trick. And what do you know, it worked. Perfectly.

If you play guitar, buy one of these pedals. It might save your sanity, or more importantly, your next gig.

The pedal removes a lot of bad hum, but slight audible artifacts occur. In a gig situation, it's a useful, easy-to-apply solution, especially when partnered with a decent gate for additional noise reduction. For precision recording, however, I expect many users will find it less than suitable.

Got the HumDeBugger yesterday and have been playing with it. It sure does what it says! Takes away the hum and, to my ears, doesn't change the tone of the guitar, which is an old Harmony Rocket single coil. I'm playing it directly through a Bose Compact, which accurately amplifies everything it sees.

Nice pedal at a good price. The staff at Sweetwater did a great job keeping me informed about the shipment and I got it within a reasonable period of time.

The pedal (knock on wood) so far seems to solve the problems that I was having. The hum is almost all gone!

Thank you

First a little background info so this will be s bit long. I'm a church musician so 90% of what I play is clean. I own really great gear. I own over a dozen guitars but my main setup is a Carvin CT6M guitar and an Egnater Renegade.
I am constantly getting a loud hum from my amp. It's so bad,at times, my clean notes sound fizzy. Believe me,nothing ruins a pretty clean part like annoying buzzing mixed in with your notes. This happens with my other guitars too.
I tried everything. High end cables, putting my effect into the input and not the loop, checking my effects one by one,using no pedals at all,I even changed pickups. Finally I took the amp home and checked the tubes in my tube tester. Changed some and plugged it in. Total silence. GOT IT BACK TO CHURCH AND LOUD HUM.
So I went on a quest to find something to battle hum and I bought a few things, none of which worked. Of course my noise gate kills the hum when I'm not playing but it does nothing when I am.
Then I came across the Hum Debugger. Did a load of research and I got one.
I hooked it up fired the gear up and as usual a loud hum. put the debugger on normal stepped on it and the hum is gone. Just that simple. This thing works great.
I've read a lot how it affects your tone. For all practical purposes, I hear no change in my clean tone other than no hum- no more.
Can't wait to see how it does on my single coils.
If you got hum, get one and you won't any more.

I play nightclubs, and many of them have power issues, seems like most of them have some kind of hum or buzz in their power. One in particular that I play regularly has an annoying buzz that is louder than the sound coming from my Strat (which has noise-cancelling pickups and a dummy coil under the pickguard). I've tried everything else including power conditioners, hum x, etc. Nothing worked, until I tried this. Granted, there is a minor difference in tone, and on the strong setting it almost sounds like you've added just a slight touch of delay, but it's not been noticed by anyone but me. It sure is better than the buzz! This pedal does exactly what it says, I keep it on my pedalboard and use it only when I have to, but it's been a lifesaver so far! The reason I bought this is that I read online that the power at Buddy Guy's club in Chicago is so bad that if you play there, you are required to use one of these, they bought like six of them for the club! If you don't want to change your pickups on your Tele or Strat, and you play clubs, keep one of these with you at all times!

doesn't fully remove hum. You can hear a strange robot noise if you use it in high gain situations. Probably very rare that anyone would notice, but very noticeable in a recording situation.

I stayed up way too late playing my 1974 Stratocaster last night.

EH recommends that this be the first pedal in line but I set it up at the end as a test. In front - Strat - Tech 21 Tri - Boss Chorus Ensemble - Digitech RP 150 (Set just with Delay and Gentle Gate) and finally the HumDebugger.

I feel that this pedal minimizes pedal noise as well as 60 cycle hum. I have read concerns about tone alteration. Zero effect at the Normal Setting - a tiny bit on the Strong Setting..

On the strong setting It almost feels like a quiet compressor.

Very subjective but there you are. A note: The Digitech gate was engaged as an experiment. It does add another level of quiet and set very softly - doesn't breathe nor pump.. But the added noise reduction is modest.

Tonight I may stay up too late with my Tele.....

This will reduce hum, but this is not purely transparent.

If your part of the performance is not front stage, then it will keep your hum from pushing you out where your not welcome. If your sound is central to the sound of the band, then you should be careful to make sure the coloration, where noticeable, fits with your sound. I would be very cautious about using this in the studio, if at all.

The fact that the A.C. adapter is required and that battery operation is not possible hints at the underlying technology. That adapter is used to collect a real-time hum sample to feed into a time-domain type circuit, where the hum is subtracted out of the desired signal. This makes this device completely unlike a noise gate, in that it removes hum regardless of signal level. That also means that its limitations are also unlike that of a noise gate.

The coloration, when it's noticeable, is somewhat reminiscent of a minimal electronic reverb or extremely short echo. Admittedly, there would be cases where such coloration might useful, but the time domain is fixed to that which can be used to cancel hum. The coloration is more noticeable in the "strong" mode. As with all effects, you'll need some time to experiment with your sound to see if it fits.

As the title of the review indicates, this pedal is amazing. I am always impressed by the quality of electro-harmonix pedals. To my ear, they seem to do what they are supposed to, and nothing else (in the best possible way). By this I mean that they provide the desired effect, but they do not alter or strip your guitar of tone. I was skeptical of this pedal would perform. My experience with noise reduction in the past has been that they have a tendency to deaden or muffle the tone when they are successfully removing noise, and when they do not mess with your tone, they are also not removing the unwanted hum. I play a single coil equipped strat through various tube amps. I generally like a sparkly, somewhat clean tone, and this tone is easy to lose when you put pedals in the signal chain. My practice room, the room in the house available for guitar related activities, also unfortunately has some sort of funky electrical issue which causes serious hum and noise when I play through single coils. It is bad. With this pedal, the single coil hum was totally gone, without any loss of tone or sparkle. I was blown away. If you play single coils, and value your tone, but hate extra noise, this is the pedal for you. It works, with no nasty side effects.

Guitarists put this box in your tool box. One of the most useful tools next to the stompbox tuner. Here's my experience with this box:

I play at Buddy Guy's Legends in Chicago regularly and the building, including the stage, is encircled by a strong magnetic field, caused by a large transformer in the basement of an adjoining office building.

This causes big problems for guitarists with single coil guitars, including Buddy, as he favors singlecoil guitars these days. So when the Hum Debugger came out, Legends bought a few - one for Buddy to use and also a few more for the booked bands to use. In fact, it is now required at Legends if you have non-hum cancelling single coil pickups on your guitar.

I was skeptical at first but the Hum Debugger silenced my Airline Tuxedo beautifully, without any noticable tone/response change. Don't walk - Run and get one of these especially if you have a noisy single coil guitar