The Electro Harmonix Q-Tron Plus comes equipped with an effects loop so you can run other effects in series with this classic envelope filter. The Electro Harmonix Q-Tron Plus also adds an attack response switch for incredible sounds.
The Electro Harmonix Q-Tron Envelope Filter gives you that classic funk sound that can be dialed in however you like. Adjustable up or down, high and low, Q, and Peak make the Electro Harmonix Q-Tron Envelope Filter almost too much funk!
The Electro Harmonix Nano Doctor Q Envelope Filter is as easy to use as pie. One knob for Range control and a Bass boost switch are all you've got. Your playing and the Electro Harmonix Nano Doctor Q Envelope Filter take care of the rest.
If you're looking for an envelope filter, the Electro Harmonix Micro Q-Tron has you covered. Funky auto wah effects and more. Plug into the Electro Harmonix Micro Q-Tron Envelope Filter and funk it up!