Radial Engineering BigShot ABY True-Bypass Amplifier Switcher with Tuner Out

Running two amps is one of the great pleasures of electric guitar — but without the right tool, hum, buzz, and phase issues can turn that dream rig into a headache. The Radial Engineering BigShot ABY solves all of that in a rugged, passive true-bypass pedal built to Radial's exacting standards.

Two footswitches let you toggle between Amp A and Amp B, or engage both simultaneously for a massive combined tone. An on-board isolation transformer and ground-lift switch eliminate hum and buzz on Output B, while the 180° polarity reverse corrects phase differences between your amps so your low end stays tight and full. Best of all, the BigShot is 100% passive — your signal passes through unaffected even without power. Add a 9V battery or pedalboard supply and the tri-color LEDs light up to show your routing at a glance, even on a dark stage. A dedicated always-on tuner output keeps your tuner out of the signal chain where it belongs.

Radial BigShot ABY Features

• 100% passive analog circuitry — works without power
• True-bypass switching between two amplifiers
• Both footswitch routes signal to Amp A and Amp B simultaneously
• Isolation transformer on Output B eliminates hum and buzz
• Ground-lift switch for additional noise rejection
• 180° polarity reverse corrects phase between amps (requires ISO engaged)
• Dedicated always-on tuner output
• Tri-color LEDs (green = A, red = B, yellow = both) — powered by 9V battery or power jack
• Glass-filled nylon housing, nickel-silver contacts, 14-gauge steel chassis

Tech Specs

In the Box

• Radial Engineering BigShot ABY True-Bypass Amplifier Switcher
• Limited 3-Year Warranty