A/B SWITCH COMPLETE KIT

A complete kit for a simple 2-channel passive A/B switch box, handy for silent tuning, choosing between two amps, running two guitars into one rig, or muting your signal.

About this kit

The A/B box is passive except for the LED indicators that show which channel is active, and either side can be used as an input or an output. Common uses from the project page:

• Silent tuning: one output to the amp, the other to a tuner.
• Two amps: choose which amp gets the signal.
• Two guitars, one rig: plug a guitar into each side and send the output to your pedalboard or amp.
• Kill switch: at the end of your effects chain, mute the signal while you swap pedals.

Passive A/B boxes have their limits: hum and noise can show up, especially when feeding two separate amps, though they usually work fine with a single amp. The project page also has wiring diagrams for versions with buffered outputs.

What you get

All the parts to build the switch box. Enclosure options:

• 125B: the complete kit with a 125B enclosure.
• No Enclosure: everything except the enclosure.

Build resources

• Complete instructions for this kit
• A/B switch box build instructions (PDF)
• Schematic (PDF)
• Parts layout and wiring diagram (PDF)
• General information about our kits