Electro Harmonix Dr. Q envelope filter
The classic 1970's funk box now available in a pocket-sized case. Dynamic picking response produces super-funky wah-like tones. The Doctor Q is an envelope filter that specializes in generating percussive punchy filter sweeps for a rhythmic groove.
Simple one-knob range control
Switch-selectable bass boost
Responds to your personal picking style
Tough and compact die-cast chassis
9-volt battery included
Optional US96DC-200BI power supply available