Electro-Harmonix Doctor Q Nano 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.

Features:

• True bypass
• 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