From MetroAmp Wiki
This unique version of a post phase inverter master volume mod is credited to Larry of Larry Amps (novosibir on the forum) and tested and approved by Mark Abrahamian (rockstah on the forum). Hense the name.
A 50+ page thread running on the Metroamp forum details the mod: Lar/Mar PPI-MV thread. A classic, for sure.
How to:
Parts required
- (1) Dual 250k Audio taper pot
- (2) 2.2M resistor 1/2W min
- (2') 2 conductor shielded coax
- (1') 22g 300V min hookup wire
Kit
Available here: LAR/MAR PPI MV KIT