FX20B Stereo Phasor / Stereo Phaser

FX20B Stereo "Phaser" (1987) and "Phasor" (1988)

The FX20B Stereo Phasor / Phaser succeeded the FX20 in late 1985, adding a Depth control and another output while revising the circuit to use three dual OTA chips. The FX20B featured six stages of phase shifting, while the Boss PH-2 Super Phaser (introduced in 1984) featured up to 12 stages of phase shifting. The FX20B was produced with several cosmetic variants (see below) until 1998, when it was replaced by the final-series FX20C.

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