With the left footswitch you can select between the A and B channel (A/B) and when you step on the right footswitch both channels are activated. Indicative LEDs show you which channel is active.
The footswitch does not require power supply. You only need a typical mono cable with TS jacks (1/4") to connect it to the back of the amplifier. The cable is not included.
The circuit was based on the original SUNN schematics.
Details & specifications:
▹ 2 latching foot-switches.
▹ TS mono jack (1/4") (cable not included)
▹ Indicative LEDs for each function.
▹ Enclosure type: 1590BB. Dimensions: 4.7 x 3.7 x 1.34 in (119 x 94 x 34 mm)
alternatively: 1590B. Dimensions: 4.43 x 2.38 x 1.22 in (113 x 60 x 31 mm)
▹ No power supply needed.