The Big Joe A/B switcher lets you alternate between channels A and B. Send one guitar to two amps or use it the other way around to select between two guitars into one amp. Thanks to low noise, all passive, mechanical switching there are no active components in the signal path to rob your guitar of tone. All connections are unbalanced 1/4". Bright LEDs indicate channel status. This is a pro quality box that won’t let you down on the gig. Run it on one 9V battery or with optional external power supply.