Boss CH-1 Super Chorus

Boss CH-1 Super Chorus — Classic Stereo Chorus Pedal

The Boss CH-1 Super Chorus has shaped countless guitar and keyboard rigs since 1989 with clear, shimmering modulation. From delicate shimmer on clean arpeggios to rich depth on high-gain leads, it covers the full range of classic chorus tones. This model is a top choice for players seeking the authentic BOSS chorus sound in a road-ready stompbox.

What Sets the CH-1 Apart

Borrowed from Roland's legendary JC-120 Jazz Chorus amplifier, the CH-1's stereo character traces back to the Dimensional Space Chorus circuit. With the EQ knob, players adjust a low-pass filter for the effect signal, dialing in either warm richness or bright sparkle. Two outputs send independent wet and dry voices to two amps, recreating the JC-120's wide stereo field in pedal form.

Four-Knob Interface for Fast Sound Shaping

Dialing in your sound is fast due to the minimal control layout. Each knob is dedicated to a single, musical parameter.

• Effect Level (E.Level): blends chorus with dry signal — subtle thickening or obvious modulation.
• Rate: sets modulation speed — slow for gentle motion, fast for psychedelic swirl.
• Shaping how wide and dramatic the chorus feels comes down to the Depth knob, which controls modulation intensity.

Stereo Outputs and Pedalboard Integration

Standard BOSS compact connections make the CH-1 drop-in compatible with virtually any pedalboard.

• Input: 6.3 mm TS (1/4-inch) jack — 1 M ohm impedance.
• Outputs: 6.3 mm TS A and B jacks — mono on A, stereo split on B.
• Bypass: Buffered bypass — preserves high-end over long cable runs.

Road-Ready Construction and Flexible Power

The familiar compact metal chassis matches the rest of the BOSS stompbox line, built to handle daily gigging and transport.

• Power Supply: 9V battery (6LR61) or PSA-series AC adaptor — roughly 6 hours of battery life.
• Current Draw: 55 mA — easy to power from a standard isolated supply.
• Dimensions: 73 × 129 × 59 mm — fits any BOSS-compatible pedalboard.
• Weight: 420 g (including battery) — substantial enough to stay put on stage.