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Radial Switchbone AB-Y Amplifier Switcher With Power-Boost And Tuner Out, PSU Inc

Manufacturer Radial

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The Radial Switchbone ABY is a high performance ABY switcher that is designed to deliver the natural tone and feel of the instrument without introducing noise, distortion or artifact of any kind.

The design begins with the same 100% discrete class-A buffering circuit as the critically acclaimed Radial JD7 Injector for exceptional audio performance. Each part is hand inserted into a double sided through-hole PCB for optimal signal transfer. To ensure the natural feel of the instrument is maintained, Drag™ control load correction lets you re-introduce the natural relationship between the guitar pickup and the amp that is invariably lost when the guitar signal is buffered. This also allows longer cable runs of upwards to 15 meters (50') without noise.

There are three footswitches on the top panel: The first selects between A or B amps while the second is used to combine amps. To get rid of the pops common to passive switchers, the Switchbone employs photocells that ramp-up the signal for smooth noise-free switching - even when used with high gain amps. To eliminate hum and buzz caused by ground loops, the Switchbone's second output is equipped with a transformer for 100% isolation. To ensure the two amps play in absolute phase, you simply toggle the easy access 180º polarity reverse switch.

The third footswitch lets you engage the built-in power booster. This is equipped with a variable level control and is augmented with a 3-position mid-boost switch for extra cut when soloing. The boost function can be bypassed and converted to a mute switch for quiet on-stage tuning. A separate tuner out is always on for quick tune-ups and buffered to keep your signal path clean. Smart 'flashing' LEDs let you know which amp was last selected keeping you in total control at all times.

The Switchbone is the most natural sounding ABY amp switcher made today.

Key Features

  • 100% discrete class-A signal path for exceptional audio
  • Exclusive Drag™ control pickup load correction
  • Variable power booster with mid control for added cut
  • Transformer isolated output to eliminate ground loops


Circuit type: 100% discrete class-A, hand inserted parts
Input impedance: Variable with Drag Control
Output impendence: 10K Ohm
Drag™ Load correction circuit for pickups
Output-1: Class-A buffered, direct
Output-2: Class-A buffered, transformer isolated
Power booster: Unity gain to +15dB
Mid boost: +9dB @ 800Hz+5dB @ 1kHz
Tuner output: Buffered always-on ¼" jack
Switching: Photocell assisted, 5m-sec rise time
LED indicators: Large 3mm OD ultra-bright LED's
Ground lift: Lifts ground at Output-2
Polarity reverse: 180º (phase) reverse at Output 2
Construction: 14 gauge steel, baked enamel finish
Size: 6.9 x 4.25 x 2.1" (175 x 108 x 54mm)
Weight: 2.35lb (1.06kg)
Production: Made in Canada
Power supply: 15VDC 400mA, center pole positive
Part # R800 9407 00 - 120volt USA, Canada, Taiwan
Part # R800 9407 01 - 230volt Continental Europe
Part # R800 9407 02 - 230volt United Kingdom
Part # R800 9407 03 - 100volt Japan
Part # R800 9407 04 - 240volt Australia

Equipment available to buy from this site is for professional use only. Please note in certain countries some products listed may not be available from A.C. Entertainment Technologies Ltd.

E&OE. Information is subject to change without notice. The rights and ownership of all trademarks are recognised.


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