The footswitch's ON/OFF function is malfunctioning. I replaced the tact switch, but it seems I've caused a problem with the circuit board. Sound comes out, but there's noise, and the sound isn't clean. All knobs and switches function normally. Regardless of the footswitch's ON/OFF state, the equalizer is always active. Looking for someone who can salvage parts or repair it (I think the tact switch area is in pretty bad shape). Tech 21 Q Strip, a multi-functional sound quality adjustment device. - Model: Q Strip Tech 21 - Number of control knobs: 7 - Output type: Parallel output - Input terminal: XLR terminal - Frequency shift: 40Hz, 300Hz, 700Hz, 6kHz - Phantom power: Supported - Exterior color: Blue - Manufacturer: Tech 21 USA, Inc.