Gamechanger Audio PLASMA Pedal

The PLUS pedal, Gamechanger Audio’s maiden voyage is probably the most unique pedal on our site. But the PLASMA pedal, Gamechanger’s second installment, is probably the coolest pedal in the HornFX database. In their own words, “the pedal transforms your instrument’s live signal into a series of continuous high-voltage discharges within a xenon-filled tube. In essence - you are playing a bolt of electricity, and the electrical discharges produced by your instrument are instantly converted back into an analog audio signal, producing a quick, responsive, and extremely heavy distortion with TONS of unique character.”

External Control: None
Cost: $$

HornFX Review

Interface:  3.5/5
The Crayon has all the simplicity of a three knob overdrive pedal with the added benefit of a simple hi-pass filter switch. The pedal may be more useful for horns if it had an expanded EQ control.

Versatility: 2/5
This pedal will give you some nice drive and some nice distortion with the gain turned up, but it does not give you the tonal range you would hope for. There is not much outside some really fat, but slightly stuffy sounding distortion that this pedal does well.

Tonal Reproduction: 2.5/5
The tonal controls, although nicely conceived, do not manage your tone as well as one would hope. The pedal has quite a stuffy sound, and cannot seem to nicely accentuate the high end of your tone, even with the EQ all the way high.

Complexity: Simple

Complexity: Simple

Live application: 3/5
This could be a good tool for some beefy distortion. It is easy enough to dial in a few different settings, but the lack of tonal versatility and the stuffiness of the sound my make you look elsewhere.

InterfaceVersatilityTonal ReproductionLive ApplicationTotal Score

Product Information



By maxing out the BLEND knob you can achieve a fully wet signal, produced only by the gas-discharge tube. This means that as soon as you stop playing,  the electrical discharge within the gas-filled tube is interrupted,  and the pedal will not produce any output signal at all.  This feature allows you to achieve extreme contrasts between individual notes, by eliminating all of the in-between noises created by the instrument’s pick-ups or by humming strings.
Thanks to this, PLASMA PEDAL is extremely well suited for playing heavy riffs or sharp staccato solos. Really – there’s nothing like it!


PLASMA PEDAL converts your instrument’s signal into a rapid series of electric discharges, which results in a large amount of non-linear harmonic saturation that causes extremely rich and responsive attacks, and brings out screechingly sharp overtones and harmonics. These harmonic artifacts, produced as a byproduct of the high-voltage discharge are uncommon in traditional signal amplification, and therefore PLASMA Pedal’s distortion is unlike anything you have heard before.


The PLASMA PEDAL loses the original DRY input signal and creates a new signal from fluctuations in the electromagnetic field surrounding the gas-discharge tube.

This allows to bring out an extremely wide range of frequencies that are often beyond the instrument’s capabilities.


PLASMA PEDAL is designed primarily for guitarists, but it is also an awesome distortion tool for all sorts of electronic beats, synths and live instrument samples. As you max up the VOLTAGE knob, you can add satisfying amounts of electrical buzz to any sound…

Product information from the Gamechanger website