Boss CH-1 Super Chorus
The CH-1 Super Chorus pedal delivers a clean classic chorus sound with crystal-clear highs and a unique stereo effect, variable between left and right speakers.
Produced from May 1989 until present.
Analog until October 2001, then digital.
The CH-1's circuit changed significantly around October 2001, with the analog MN3007 BBD replaced with digital circuitry and SMD components. This gives modern CH-1's a different feel to the original versions.