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Special Offer Source Audio One Series C4 Synth Guitar & Bass Synthesizer Pedal Used Deal Alert: 75% Off [m5wWVDGr]

$39.99 $127.99 -69%

Source Audio One Series C4 Synth Guitar & Bass Synthesizer Pedal UsedUsed with wear associated with use. Minor cosmetic scratches/scuffs from handling and play. Any noteworthy blemishes or issues will be described and pictured. Works as it should

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Special Offer Source Audio One Series C4 Synth Guitar & Bass Synthesizer Pedal Used Deal Alert: 75% Off [m5wWVDGr]

Source Audio One Series C4 Synth Guitar & Bass Synthesizer Pedal Used

Used with wear associated with use. Minor cosmetic scratches/scuffs from handling and play. Any noteworthy blemishes or issues will be described and pictured. Works as it should.

We strongly recommend using the proper power supply for any pedal. Daisy chain power supplies may not supply enough power when using multiple pedals or introduce noise into the chain. Consult the pedal manual when available for manufacturer recommended power specifications.

Our engineering team, are back in the sound laboratory developing the next Source Audio effects pedal. This new endevour may be our most ambitious yet - it is a small footprint guitar/bass synthesizer pedal knows as the C4 Synth. Please feel free to check in on this page anytime for the most recent updates in the development process. And of course, we want to hear your thoughts and suggestions - head over to The Gear Page and join a public conversation on the C4.

Source Audio Engineer Bob Chidlaw and his Eurorack synthesizer
The C4 Synth from Source Audio
The first thing we need to do is explain the big idea behind our latest project. Bob Chidlaw (Source Audio's Chief Sound Engineer), feeling inspired by his personal Eurorack modular synth rig, set out to built a powerful synthesizer machine, specifically designed to live inside the compact structure of a Source Audio One Series housing. The C4 is, for all intents and purposes, a modular synthesizer in an box.

On the surface, the C4 features a simple 4-knob interface and a choice of three guitar/bass synthesizer effects - just plug-in and submerge your instrument in a sea of swelling, buzzing, and swirling synth tones. If you want to take things to take things a bit further, we urge that you connect the C4 to our Neuro Desktop Editor (a free download for Mac and Windows) or Neuro Mobile App (a free download for iOS and Android). Inside the Neuro Editors you will find the tools to personally create your own retro-futuristic synthesizer tones. Use the C4’s collection of four parallel voices, three oscillator wave shapes, ten-plus envelope followers, twenty-plus modulating filters, distortion, tremolo, pitch shifting, intelligent harmonization, programmable sequencing and more to dial in that perfect tone. Find it all, from the classic synth tones you've always wanted to replicate to those illusive abstracts you've imagined, but never actually heard. If you're short on time and/or patience, it's very easy to find tons of great sounds - simply call up an effect from countless presets created by the Source Audio team or the growing legion of C4 users.

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What Our Customers Say

February 2, 2026

Absolutely no complaints!

It’s a very fine product. I do recommend it highly.

- Daniella Q..

February 2, 2026

Absolutely no complaints!

A great product. A very, very big thank you.

- Monica U..

February 2, 2026

Absolutely no complaints!

I'm happy with my product and its purchase.

- Christie P..

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