Radial BigShot ABY Amp Switcher



R800 7210

The Radial BigShot ABY is a compact ABY switcher that enables you to either switch between two amplifiers or combine the signal when you want both amps to play at the same time.

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

Designed for the purist, this true-bypass ABY switcher is completely passive meaning that there are no tone altering buffers in between the guitar and the amplifier. With the BigShot ABY, you get the pure tone from your guitar plugged direct into your amp! To add versatility, the BigShot ABY is also equipped with a separate tuner out. This ‘always on’ output feeds your tuner for constant monitoring while keeping it out of the signal chain. Should you experience hum and buzz problems due to ground loops, the BigShot ABY comes to the rescue with a built-in isolation transformer and ground lift switch. Once engaged, you can toggle the polarity of the second amplifier to ensure both amps play in absolute phase.

In use, the BigShot ABY is both simple to use and efficient on stage. When powered by an external 9V supply or pedalboard power brick, full size super-bright LEDs spring to life to provide instant on-stage amplifier status readout. When power is unavailable, the passive audio signal path still works, unaffected. The compact yet ultra-rugged design makes the BigShot ABY ideal for pedalboards where space is always at a premium.

The BigShot ABY… the most versatile true-bypass switcher made today!


Circuit Type: Passive, true bypass
Frequency response: 20Hz – 20KHz
Gain: -.3db
Phase response: < 1 degree
Switching: 100% passive

Output-A: Direct output
Output-B: Switchable transformer isolated or direct output
Tuner output: Always-on 1/4″ jack
LED indicators: Large 3mm OD ultra-bright LED’s
Ground Lift: Lifts ground at Output-B
Polarity reverse: 180 degree (phase) reverse at Output-B
ISO switch: Engages isolation transformer on Output-B

Power Supply: 9VDC, center pole negative
Construction: 14-gauge steel
Finish: Durable powder coat
Size: 3.6″w x 3.9″l x 2″h
Weight: 1.25 lb (0.56 kg)
Conditions: For use in dry locations only between 5 degC and 40 degC
Production: Made in Canada

Specifications are subject to change without notice.



Radial Engineering is based in Port Coquitlam, BC, a short drive from Vancouver. A longstanding reputation for bringing reliable and tough-as-nails problem solvers to the market means you will see Radial products on stages and in studios world-wide. These products include the world's finest direct boxes, splitters and audio interfacing devices. As the maker of some of the best pro audio gear in the business Radial’s products have graced the stages and studios of many of music's biggest acts including Rush, U2, Bruce Springsteen, AC/DC, Billy Joel, Paul McCartney, Al Schmitt, and Elliot Scheiner, among many others. In business since 1992, the company is responsible for what are arguably two of the best direct boxes on the market, the JDI and the J48. Radial products are also regularly chosen by audio/video integrators for use in non-music applications but where pristine audio is required. With approximately 100 employees, Radial boasts in-house research and development, and engineering and production departments where all the products are proudly Canadian-made. An extensive network of dealers and distributors makes Radial product available around the world.


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