ENVELOPE FILTER

RastopStart with Gain and Sensitivity in the middle, Mix- all way down. Some technical details: Optical, LDR-based VCF, full-wave rectifier and hi-gain NPN transistor LED drive for minimum distortion. High input/low output impedance. True By-Pass switching. Exterior/paint job available: Tweed, Black Tolex, Blue Hammered paint. Custom options: custom exterior with customer-provided materials Two 9V batteries version for extra clean headroom when using super-hot humbucking pickups LED color of choice for bass guitar: combined with MOSFET distortion and voiced for thunderous lows.