The Purple Cat Audio Moka is a custom built fuzz and overdrive pedal from Purple Cat Audio, a small custom pedal maker in Southwest Ohio. It is an analog design based on the classic harmonic percolator circuit, and RockBoard's PedalPedia describes it as being for players who want "rich, dynamic breakup and harmonic content"1.
What it does
The Moka sits in the territory between fuzz and overdrive, taking the harmonic percolator circuit as its starting point. That circuit is known for producing unusual harmonic content rather than a straightforward clipping sound, and RockBoard's PedalPedia describes the Moka as emphasizing "controlled harmonic distortion with a responsive feel and vintage flavor"1.
Because it is aimed at both guitar and bass players, it is designed to keep low strings intact while adding breakup and harmonics, according to RockBoard's PedalPedia's description1.
Build and power
Each Moka is handcrafted, and RockBoard's PedalPedia describes the pedal as custom built rather than a mass produced unit1. It runs on a standard 9V DC, center negative supply and draws 15mA, which puts it comfortably within the reach of most pedalboard power supplies1.
Videos
Purple Cat Audio
Sources (1)
- Moka by Purple Cat Audio, RockBoard PedalPedia, 2026

