Electro-Harmonix Synth 9 Synthesizer Machine

Synthesizer Emulation Pedal for Electric Guitar and Bass
Electro-Harmonix Synth 9 Synthesizer Machine image 1
Electro-Harmonix Synth 9 Synthesizer Machine image 1
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The New Synth9 Pedal

will begin shipping from Electro-Harmonix late March/early April. Preorder your pedal today, risk-free, and we'll ship as soon as they become available.

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Electro-Harmonix Synth 9 Synthesizer Machine
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Turn Your Guitar Into 9 Vintage Synths

Continuing their line of effects pedals designed to render keyboardists obsolete (just kidding), the Electro-Harmonix Synth 9 Synthesizer Machine pedal allows you to coax classic synth tones from your guitar or bass. And it doesn't require a special pickup system either — just add it to your pedalboard like any other effects pedal. Nine presets give you access to some of the most iconic synth sounds from the '70s and '80s. And thanks to an extremely wide playable range, the Electro-Harmonix Synth 9 pedal delivers precise tracking with both guitar and bass.

Precision tracking across a wide playable range

Just like the Electro-Harmonix B9, C9, Key9 and Mel9 emulation pedals, the Synth 9 Synthesizer Machine boasts ultra-precise tracking for glitch-free performance. The playable range is huge — it'll track accurately on your guitar all the way up to the 23rd fret on your high E string. On bass, the Synth 9 tracks accurately all the way down to your open A string.

Electro-Harmonix Synth 9 Synthesizer Machine Pedal Features:

  • Synthesizer emulation pedal with 9 presets for electric guitar and bass
  • Precision tracking from the 23rd fret on a guitar's high E string, down to the open A string on bass
  • Separate Dry and Effect outputs allow for dual amp setups
  • CTRL1 and CTRL2 knobs offer preset-dependent controls like filter envelope depth, voice intervals, and more
  • 9-volt power supply included

Tech Specs

Pedal Type 9 x Synth emulations
Inputs 1 x 1/4"
Outputs 1 x 1/4" (effect out), 1 x 1/4" (dry out)
Power Source 9V DC power supply (included)
Height 2.1"
Width 2.75"
Depth 4.5"
Manufacturer Part Number SYNTH9

Customer Reviews

Based on 4 reviews
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Great sounds from the Synth 9

I had always been skeptical regarding guitar synth effects, but after seeing the demo I couldn't wait for the release of it. Great sound! Very easy learning curve. Very intuitive functions. I use it to add fullness and subtle background effects over both rhythm as well as lead riffs. I am completely satisfied with it, as are all of my band mates! This opens up many possibilities to expand and explore your music.

Out of the Park...

Once again, EH has a home run. The whole "9" series is setting a new standard for guitar synths. Not only are the sounds perfect emulations of the synths they represent, but the interaction with the guitar is new and different from a typical GR-55 or similar guitar synth. These devices behave differently if you're playing chords from playing single notes. So there's a level of surprise that comes into play as you learn it's response. And the subtle variations that "control 1 & 2" offer give each of the 9 voices individuality. These things go beyond making sounds to being an inspiration to new compositions... All I can say is: "MORE, PLEASE!"
Music background: 35 years producing

Amazing, Versatile, Tracks VERY Well, Sounds Great!

First: Kudos to my Sweetwater rep, Ben Porter! The Electro-Harmonix Synth 9 is absolutely amazing. I have been a fan and a customer of Electro-harmonix since the 1970's, and their products have always been fantastic, and great value for the money, too. The first thing I did, was plug the Synth 9 into an acoustic guitar with a bridge pickup. It worked, but I was a little disappointed - so, be advised, if you're using the Synth 9 with an acoustic guitar, you may need to add a preamp between it and the acoustic guitar. HOWEVER: The next thing I did was plug it into one of my electric guitars. HAPPY, HAPPY, JOY, JOY! This thing tracks perfectly with an electric guitar - especially when, as the instructions say, you turn up the volume on your guitar all the way, and use the bridge pickup. I noticed that the settings of the tone knob on the guitar affects the timbre, just SLIGHTLY, so experiment around with that for an extra fun dimension. All of the patches are polyphonic. Patch #4, "Mini Mood," has another oscillator that is monophonic (the level of which is set by CTRL 1) to which a portamento effect can be applied, using CTRL 2 - a GREAT patch for lead playing. All the patches sound great for chords and for soloing, depending on how you set it up. The knobs marked "CTRL 1" and "CTRL 2" have different functions, depending upon the patch number you're using. The instructions come with a sheet that has "suggested settings," which are good starting points - on patches where CTRL 1 is acting as a tone / filter cutoff control, I tend to prefer the it set to a less resonant setting - in other words, rotated a bit more counter-clockwise, for a mellower, woodier tone - I just think it sounds a bit more organic, vintage, and analog, but that's a matter of personal preference. On the back of the "Suggested Settings" sheet, you'll find a sheet of blank settings diagrams, so you can record your own settings - don't forget to make a ton of copies of the patch sheet, so you can keep your original for future copying. The sounds created by the oscillators are big, sophisticated, and convincing, and the filters sound rich, lush, and big. There have been many attempts in the past, by a host of companies, to create guitar synthesis in small pedals, as well as big rack-mounted units - mostly, unsuccessfully, and the few successful attempts have usually resulted in very expensive units. The Synth 9 hits the nail on the head. The bottom line is, if you want to add synth sound to your arsenal of sounds, this is a SUPER affordable way to do it. Get one of these, and add a Mel 9 (Mellotron emulator, available at Sweetwater), and you'll have most of the sounds of the 1960's, 1970's, and 1980's. (Incidentally, the Mel 9 DOES work well with acoustic guitars, according to some professional reviews.) My next purchases, because of how well the Synth 9 works, will be a Mel 9, and an Electro-Harmonix C9 keyboard emulator, both available at Sweetwater. Thanks again, Electro-Harmonix, for creating such great products at so affordable of a price point!
Music background: Former professional, now musical hobbyist

Full of Synth!

Just got my pedal today and am putting it down for the first time. Need to let the power supply cool off! This thing really is amazing, just need to play with the settings. Haven't hooked it up to my board yet to see how nice it plays with other effects, but that will happen in due time. Already picked up synth lines on Xanadu. Subdivisions is next on a very long list of tunes to try and tackle. Shout out to my rep, Stewart Hisey...He kept me updated every week. I was thinking I wasn't getting this until first week of April, but got my email from Stew that it shipped yesterday and it came today. I shall be immersed in synthful bliss all weekend long! Thanks so much Stewart!!!
Music background: Guitar
See also: Harmonizer Pedals, Electro-Harmonix, Electro-Harmonix Harmony Processors