Geargas Effect Pedals and Custom BYOC Pedal Builds
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BYOC Brown Face Harmonic Tremolo Pre-Built

Geargas Store

BYOC Brown Face Harmonic Tremolo Pre-Built


Harmonic Tremolo is a unique effect found only on certain models of Brown Face era Fender amps.  It works by splitting your signal into a high pass filter and low pass filter, panning between the two filters, and then mixing the two signals back together into a mono signal.  The resulting effect lies somewhere between a tremolo and phase shifter. 

The BYOC Brown Face Harmonic Tremolo is a semi-original design.  It is an almost literal solid state translation of the harmonic tremolo circuit found in the 6G4-A, 6G5-A, 6G7-A, 6G12-A, and 6G13-A.

This version is assembled and tested by hand in our shop from a brand new kit.

We are an authorized BYOC Dealer.

  • True bypass
  • Battery power or 9v adapter power
  • Controls for Speed and Depth.

We warranty pre-builts for 5 years.

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