BigShot ABY
A compact passive true-bypass ABY pedal for guitarists running two amps. It switches between the amps or feeds both at once, with a transformer-isolated second output to cut ground-loop hum and a polarity reverse to keep the amps in phase.
- True-bypass ABY switcher for two amplifiers
- 100% passive audio path, works without power
- Isolation transformer and ground lift on second output
- 180° polarity reverse to phase-match amps
- Dedicated tuner output, always on
- LEDs light with external 9V supply
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The BigShot ABY has two latching footswitches. One selects which amp is active, and the other runs both amps together. The audio path is fully passive and needs no power, so the signal is not coloured by buffers between guitar and amplifier. An optional 9V supply or pedalboard power brick only lights the LEDs that show which amp is selected.
The second amp output has a ground lift and a switchable isolation transformer to remove buzz and hum caused by ground loops. A 180° polarity reverse switch lets the two amps be phase-matched to avoid frequency cancellation when both are on. A separate tuner output stays live all the time, so a tuner remains out of the main signal path.
Beyond two-amp setups, the pedal can work as a mute switch for silent tuning, because pressing the AB selector cuts the signal to the amp while the tuner output stays on. It can also select channels on older amps without remote switching by sending Out A and Out B to the two channel inputs.
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Specifikacije
- Marka
- Radial Engineering
- Model
- BigShot ABY
- Kategorija
- Efekti i pedale
Audio
- Type
- True-bypass ABY amp switcher
- Audio path
- 100% passive
- Isolation
- On-board transformer on second amp output
- Ground lift
- Second amp output
- Polarity
- 180° polarity reverse switch
Outputs
- Amp outputs
- Two (Out A and Out B)
- Tuner output
- Separate, always on
- Amp modes
- A, B or A+B simultaneously
Controls
- Footswitches
- Two latching footswitches
- Switches
- Ground lift, isolation transformer and polarity reverse
- Indicators
- LEDs for amp selection
- Mute function
- AB selector can mute the signal to the amp
Power
- Audio operation
- Does not require power
- LED power
- External 9V supply or pedalboard power brick
Physical
- Form factor
- Compact pedal
- Part number
- R800 7210 00
Documentation
- Resources
- User guide, owner's manual and smart sheet