FX25 Envelope Filter

Two 'original series' cosmetic variants of the FX25, from 1984 (left) and late 1987

The FX25 Envelope Filter was derived from DOD's well-received 440 Envelope Filter. Like the 440, the FX25 uses a bandpass filter circuit where the peak frequency is determined by the input signal level, for a touch-controlled wah or auto-wah effect. The FX25 was one of the original ten DOD FX-series pedals that debuted in 1982, and remained in production until it was replaced by the FX25B in 1998.

home * FX index * America's pedal? * field guide * serial no. info * FX literature
what's new? * FX tech info * links *disclaimer/legal/contact us