http://www.vfepedals.com/woodchipper.html
The WOODCHIPPER bass octave fuzz is derived from the classic Maestro Brassmaster circuit. In order to fit it all in a compact package, we sourced an expensive, military-spec audio transformer that delivers the same frequency response in a much smaller package. Next, we added a more flexible EQ section, and a unique BOTTOM control that adds clean low-bass that adds punch and fatness to the octave fuzz.