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Marshall JCM900 4100 100-watt 2-channel Tube Head

100-watt 2-channel Tube Guitar Amplifier Head with 4-band EQ, Reverb, Effects Loop, and Line Out
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Item ID: JCM900
Marshall JCM900 4100 100-watt 2-channel Tube Head
Marshall JCM900 4100 100-watt 2-channel Tube Head

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JCM900 4100 100-watt 2-channel Tube Head and 1960A 4x12" Angled Cabinet

JCM900 4100 100-watt 2-channel Tube Head and 1960AV 280-watt 4x12" Angled Extension Cabinet
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Product Image - This Item - Marshall JCM900 4100 100-watt 2-channel Tube Head
Marshall JCM900 4100 100-watt 2-channel Tube Head
$2,449.99
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Link to Gator Cableworks Headliner Series Speaker Cable - 3 foot
$29.99
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Link to Marshall 1960A 300-watt 4 x 12-inch Angled Extension Cabinet
$1,099.99
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Get Big Rock Tones with the JCM900 Reissue

Bring legendary Marshall tone to your rig with the JCM900 4100 guitar amplifier head. With dual channels, a shared 4-band EQ, and 100 watts of all-tube power, you've got an amp that is ready for any gig on any stage. This version of the Marshall JCM900 includes a series effects loop with true bypass operation — perfect for gigging musicians with lots of pedals. Step up to the professional's choice for outrageous Marshall tone — the JCM900 4100 guitar amplifier head.

Related Videos: JCM900 4100 100-watt 2-channel Tube Head

The versatile sound of rock

Plug your favorite guitar into the all-tube, 100-watt JCM900 4100, hit a chord, and hold on — that tingling behind your eyeballs means you've tapped into the tone that shaped modern rock. The JCM900 won over tons of guitar players with its incredible versatility. Channel A goes from sparkly clean all the way up to raucous crunch and everything in between. Channel B gives you everything from crunch to soaring, saturated lead tones. Each channel on the Marshall JCM900 features independent volume, reverb, and gain. The shared 4-band EQ lets you dial in exacting tonalities for any sound you need. The Marshall JCM900 4100 is an amazing and flexible workhorse amplifier head.

Marshall heritage and quality

Every Marshall JCM900 is made at the Marshall factory in the tonal heart of England. Time-tested, traditional methods of craftsmanship and construction are combined with the latest advances in modern manufacturing technology, ensuring world-class build quality and roadworthiness. Internally, the JCM900 circuitry and layout has been kept to a minimum, ensuring the integrity of the guitar tone and an incredibly low noise floor — this coupled with meticulous valve selection and high tolerance, quality components adds to the all-important reliability factor that is synonymous with the Marshall legend.

Add your favorite pedals with the series FX loop

Consider yourself lucky, because this JCM900 4100 sports a feature not found on the original JCM900 — a series effects loop! And thanks to true bypass operation, your slew of pedals won't color the tone of the JCM900 4100 one bit.

Marshall JCM900 4100 All-tube 100-watt Guitar Amplifier Head Features:

  • Reissue of the beloved JCM900 all-tube head
  • Incredibly powerful at 100-watts — not an amp that's made to be played quietly
  • All-tube design and tone featuring ECC83 and 5881 tubes
  • Series FX loop lets you switch effects pedals in and out, with true bypass operation for sonic transparency
  • Straightforward control set is all you need to craft a range amazing guitar tones
  • 2 speaker outputs for connecting extension cabinets
  • Birch-ply construction is incredibly strong and ready for life on the road

Resources

From the Manufacturer

JCM900 4100 100-Watt 2-Channel Tube Head User Manual
Guitar Amp Buying Guide
Marshall Amps' Legendary Legacy of Loud!
Sep 24, 2021

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Tech Specs

  • Type: Tube
  • Number of Channels: 2
  • Output Power: 100W
  • Preamp Tubes: 2 x 12AX7 (preamp), 1 x 12AX7 (phase invert)
  • Power Tubes: 4 x 5881
  • Reverb: Yes
  • EQ: 3-band EQ, Presence
  • Inputs: 1 x 1/4"
  • Outputs: 2 x 1/4" (speaker out), 2 x 1/4" (direct, compensated)
  • Effects Loop: Yes
  • Footswitch I/O: 1 x 1/4" (channel, reverb)
  • Footswitch Included: Yes, 2-button footswitch
  • Bias Type: Adjustable Fixed
  • Construction Material: Black Tolex
  • Power Source: Standard IEC AC cable
  • Height: 12.2"
  • Width: 29.5"
  • Depth: 8.6"
  • Weight: 41.5 lbs.
  • Manufacturer Part Number: 4100-U

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Reviews

4.4

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Customer Photos & Videos

Solid sounding head!
I bought a reissue jcm900 and I am pleased with it.
I always wanted one back in the day but couldn't afford one back then. (Typical broke kid musician)
Its an excellent head when cranked up. On 50 watt switch and volume on 4 and gain maxed, its got a nice tonal sweet spot that sounds as expected!
This is a great head with lots of potential with pedals on clean or dirty.
by Sweetwater Customer on
Great Amplifier!
Like many reviewers here I have owned my JCM900 since the early 1990's. I sure hope Marshall still makes these exactly like they used to because this is a KILLER amp. During my many touring days other guitarists would constantly approach me to ask me about my sound/tone. I'd laugh, it was just a Les Paul plugged into a Marshall JCM900. My JCM900 withstood years or road/roadie abuse and I'm going to venture to say I recall it NEVER broke down on me during a show or recording session in all those years. I have other amps, rectifiers, JMP's etc. While different amps are nice to have this one is the desert island amp hands down.
by Jeff O'Rourke from Los Angeles on
Awesome amp
This is a great amp! I would bypass the direct outputs and mic it btw also get a power attenuator to hear it's full potential! Just remember to take care of your tube amps! Warm them up for 5 minutes before playing and when you first buy a tube amp check/adjust that bias voltage! As always Jeff at Sweetwater made the transaction easy!
by Dave Stallard from PA on
Best amp ever made, the reissue sounds excellent
I want to write this review to hopefully help serious guitar players out there who are in search of a great amp. There's a lot of misleading information about this amp online. It's one of the strangest things I've come across. They say it's "harsh", and doesn't sound good at low volumes. Absolutely false. This amp sounds amazing at low volumes, if anything maybe better. As far as my ears are concerned, its the best amp I've ever heard. I've been playing guitar for over 10 years. I've been through a lot of tube amps, vox, mesa, orange, fender, music man, amp 65, I've heard a lot of amps online. This amp is the best, I've paired it with a Marshall 1960a cab, it is satisfying, the cleans are excellent and full, the distorted channel is perfect, the reverb sounds excellent, there is even low gain crunch, this amp sounds like a Marshall, but with a modern amount of gain. Can do zeppelin to nirvana to modern metal. This in my opinion is Marshalls final evolution in amp making.

I've never heard an amp with such great cleans and distortions, usually it's one or the other on amps with both, the distorted channel is powerful not flat/over compressed, and not scooped like a rectifier, if you have a clean section of a song and cut on distortion with the foot switch it feels powerful still. This amp makes all my guitars sound expensive.

If you are serious about guitar tone, and have found disappointment with various amps, give this one a try, its a perfect sound. And you need to be through a good 4x12. Ideally the 1960, with the 1960 4x12 this amp is full, smooth, hefty, but still tight, and can be bright without being harsh, just sounds right. Sounds like guitar. Also, it records excellently, my recordings of guitar now sound realistic. Very happy with this amp, been searching for many years for this, the search is over.
by Dean from Ny on
It’s just so darn good with a Les Paul standard

I bought this jcm 900 from Colin at sweetwater. I've wanted one of these for a good while. Hard to find d these days due to Marshall's production right now. Sooo at gone in our garage we have various drum, bass and guitar rigs setup. The current guitar set up is either a fender hot rod deluxe combo - which's is sooo good with any guitar. Or a pretty old Marshall jcm 2000 50 watt head (96') I think..and an even older 1993 Marshall 1960 cabinet—-this setup is the gold!! Sounds sooo good. Ok bought the new reissue jcm 900 and put it on the old cabinet…, honestly it did not sound all that great…. Hmmm it was good but not $ great. So I switched the ohms to 8 and put it on my so sons Mesa boogie 4x12 cab……wow!!!! Dude the jcm 900 came alive!!! One of the best setups I've heard in 35 years of playing. So this head is now paired perfectly with the Mesa cab and Gibson Les Paul standard. Just wow with that Mesa 4x12 cabinet

by Graham Hargrove from WOODLAND, WA on
Music background: 30 years bass and guitar

There are countless "British"-style guitar amplifiers out there, but take it from the lifelong guitarists and tone connoisseurs at Sweetwater, when it comes to Marshall tone, there's nothing like the real thing. We've played them all, from vintage JTM45s and the ultra-cool Plexi reissue to modern handmade masterpieces such as the JVM410. There isn't a model among them we can't recommend with total confidence, and that includes their more affordable models too, like MG, DSL, and Code series amps. Thanks to our tight relationship with Marshall, Sweetwater's always on the cutting edge of their latest designs, custom models, and limited-edition gems. If you want iconic tone from across the pond, you want Marshall, and your Sweetwater Sales Engineer will help you find the perfect one.

See also: Amp Heads, Marshall, Marshall Guitar Amp Heads