ToneBone HEADBONE Amp Switchers

Amplifier Head Switchers.

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The Radial Headbone allows two different guitar amp heads to be used with a single speaker cabinet.

With the Headbone, one head could be used for rhythm while a second head could be used for soloing. With 100% discreet Class-A circuitry and choice of either buffered or un-buffered inputs, the Headbone will be of particular interest for players that demand the utmost in tonal performance.

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The Headbone is available in 3 models:

  • The Headbone-VT for two valve/tube heads,
  • The Headbone-SS for two solid-state heads
  • The Headbone-TS for tube to solid-state amp head switching.

The Headbone's internal switching comprises a sequence of relays, photocells, and load resistors, all of which are controlled via a digitally programmed chip. Hit the footswitch and the Headbone toggles the guitar signal from one amp to the other, disconnects the speaker and diverts the signal to a load resister, reconnects the speaker to the second head and turns on the guitar, all in quick succession. The Headbone features SafeMode™ whereby even when power is disconnected; the Headbone will automatically default to 'head-1 to cabinet' status, ensuring a constant load on the amplifier.

Headbone comes equipped with Slingshot™, an easy-to-use switching system that uses any standard footswitch to toggle the Headbone's status remotely, from wherever the footswitch is located. Slingshot lets you keep the amp-to-speaker cables short and efficient and opens up new switching possibilities too. Headbone – another Radial 'power tool' for serious guitarists. 

  • Switch 2 heads using one speaker cabinet
  • Slingshot™ remote control with any footswitch
  • Digital micro-controlled relays for failsafe switching
  • Choice of direct or buffered input
  • Models for tube amps (VT), solid-state (SS) or both (TS)

 Using the Headbone



When the Headbone becomes part of your system, it will take on the role of being the central hub that connects your guitar to your two heads and your cabinet. As such, this means that there will be many cables coming and going from all sides. Make sure you use high quality cables and keep them as short as possible to ensure best performance.

Using the Slingshot remote control is an essential part of the system as it will allow you to position your Headbone next to your amplifiers and remotely control the switching from your pedalboard. Below details how you would connect your Headbone. For complete details, please consult the user manual.


Connecting the Headbone is easy. You need three guitar cables and three speaker cables. It is just a simple matter of following the signal flow. The connections for Headbone VT, SS, and TS are identical – the Headbone VT is shown here.

Note: Radial's high-grade speaker cable kit including 3 x 6-foot 12-gauge speaker cables is available from your Tonebone dealer: Order # R800 7082 01

First, sure all amplifiers are off and volume levels set to zero.

Connecting the three guitar cables:
1. Connect the guitar to the Headbone 'BUFFERED INPUT'.
2. Connect the Headbone ‘TO AMP-1 INPUT’ to your first head.
3. Connect the Headbone ‘TO AMP-2 INPUT’ to your second head.

Make sure you set the impedance on both heads to match your speaker cabinet. Most heads allow you to select between 4-Ohms, 8-Ohms and 16-Ohms. If you are not sure, consult your Tonebone dealer. Now turn on your amps and slowly turn up your volume. It is a good practice to always test your equipment at low levels as most system errors are caused by improper connections. This way, should something not be working, it is highly unlikely that you will cause system damage.

Connecting the three speaker cables:
4. Connect Amp-1 speaker output to the Headbone 'HEAD-1' input.
5. Connect Amp-2 speaker output to the Headbone 'HEAD-2' input.
6. Connect the Headbone 'TO SPEAKER CABINET' to your cabinet.

If all is working, you can now add your pedal board to the system. If you have a signal buffer like the Radial Loopbone or Switchbone, you should use the Headbone’s un-buffered input.

Using the Slingshot™ remote:

Slingshot™ remote can use any footswitch to control switching from afar.

The Slingshot remote on the Headbone is a simple contact closure that employs a latching footswitch. Most standard guitar amplifiers use these switches to change amp channels or turn on the reverb. Most Tonebone dealers have these types of switches in stock. As soon as you connect a switch to the Slingshot input, the on-board switch will be bypassed, allowing remote switching.

You're now set to go! 

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