BigShot ABY

The BigShot ABY by Radial Engineering is a true-bypass ABY switcher designed to facilitate seamless switching between two amplifiers or simultaneous use of both amps, while effectively eliminating buzz and hum caused by ground loops. The technical specifications and features include:

- True-bypass ABY amp selector with LED indicators
- On-board transformer to eliminate hum & buzz
- 180° polarity reverse to phase-match amps
- 100% passive audio path, does not require power

The pedal features two latching footswitches for easy selection of the active amp or simultaneous use of both. The second amp output includes a ground lift and an isolation transformer that can be engaged to eliminate buzz and hum from ground loops. Additionally, a 180° polarity reverse switch ensures both amps play back in phase to avoid frequency cancellation.

The BigShot ABY is a versatile device with multiple use-cases, including:

- Combining two amps and a tuner: The built-in isolation transformer helps eliminate hum and buzz caused by ground loops, with a separate tuner out to keep the device out of the main signal path.
- Muting the amp: The ABY can be used as a simple mute footswitch for quiet on-stage tuning, allowing the signal going to the tuner output to remain on for tuning without bothering others.
- Switching channels on vintage amps: It can be used to switch channels on older vintage amps that do not have remote switching by sending the OUT-A and OUT-B to the two channels on the amp and selecting channels as needed.

The BigShot ABY is a compact and efficient solution for managing multiple amplifiers and is designed to maintain the pure tone of the instrument with its true-bypass design.