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Electro-Harmonix SYNTH9 Synthesizer Machine Guitar Effects Pedal

Create those coveted vintage synth sounds with your guitar or bass with the Electro-Harmonix SYNTH9.


(4 reviews)


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MSRP: Old Price $295.10 Discounted Price $221.30 Save : $73.80 (25%)
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MSRP: Old Price $295.10 Discounted Price $221.30 Save : $73.80 (25%)
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The polyphonic SYNTH9 Synthesizer Machine transforms your guitar or bass with 9 presets that were precisely tuned to emulate the most sought after, vintage synthesizer sounds ever! From searing lead synths to spacey synth pads and deep, funky, synth bass grooves, it’s all accessible.

The SYNTH9 is also super easy to use with DRY volume, SYNTH volume, CTRL1 and CTRL2 knobs that provide precise control over each preset’s parameters.

If you dig the kind of classic synth sounds made famous on recordings by groups like ELP, EVH, Kraftwerk, Joy Division, P-Funk, and Peter Gabriel, you will love the SYNTH9. Includes power supply.

  • The SYNTH9 is generally best used as the first pedal in an effects chain. Place modulation, delay, and reverb effects after the SYNTH9. The unit will not perform well if placed in the effects loop of a guitar amp.

  • For optimal playability, set the guitar’s pickup selector to the bridge pickup and turn the volume knob all the way up (“10”).

  • Avoid placing a distortion or overdrive in front of the SYNTH9, which could muddy up the input signal and cause the tracking to be unstable. If you want to add overdrive or distortion, place it after the SYNTH9.

  • The SYNTH9 has a built in compressor that is active on the synth sounds at all times. We recommend you do not insert another compressor into your signal chain while the SYNTH9 is in effect mode.

Get your Electro-Harmonix SYNTH9 Synthesizer Machine Guitar Effects Pedal today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.

Things You Will Get:

    Effects Pedal
    Power Supply



very cool pedal, and very versatile. That versatility comes with a steep learning curve, however. Literally millions of button/dial combinations. I wish EHX had a downloadable book to show more than the 9 suggested settings for the pre-sets! That being said, I'm still having a lot of fun with it!



Synth 9


Numerous great sounds if used sparingly I can see this being over done



Happiest Son Ever


I bought this pedal for my son for Christmas. He currently serves in the US Army and it has brought great joy to him. When he's not working g he says he's jamming out on his guitar and loving the different acoustics coming from it with its various settings. I dont think I could have found a better gift or pedal for the kid ... I'd like to thank the young lady that helped me out at Sam Ash for picking this pedal.



Great sounding pedal!


As someone who is by no means a good keyboard player but loves synth, this was an excellent way of playing chords to complicated for me to do on a keyboard but easy on guitar. I have also been loving hooking the synth9 up to other effects!



SYNTH9 Synthesizer Machine Guitar Effects Pedal

4.5 4


Series .
Warranty Info:

The manufacturer's warranty covers parts for one year and labor for one year from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.