Here is an older - probably late 90's - Electro-Harmonix QTron Envelope Controlled Filter big-box pedal in good condition and in perfect working order. A big box version of EHX’s beloved funk machine, this QTron delivers super phat filtered sounds with a broad frequency response to ensure compatibility with just about any instrument. Whether you end up in bubbling Bootsy Collins bass territory or quacked-out Jerry Garcia cocked wah soundscapes, there are arguably very few faster shortcuts to a slew of unique sounds than this Q-tron. Controls include Peak, Gain, Range, and Mode (Low Pass, Band Pass, High Pass, and Mix BP/Dry) knobs, with two-way Drive (Up/Down Filter Sweep) and Range (“Hi” with overtones emphasized and “Lo” with vowel-like emphasis) switches. This QTron also features independent Wet and Dry outs.The large polished aluminum enclosure definiotely shows surface wear. Has original ridged pointer knobs. Listing is for the pedal ONLY.