Radial Headlight User Manual
Guitar amp Selector
Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5
Tel: 604-942-1001 • Fax: 604-942-1010 • Email: info@radialeng.com
tonebone HeadliGHt
Guitar amp Selector
Introduction ....................................................................................... 1
Features ........................................................................................ 2-3
Making Connections ...................................................................... 4-5
Connecting a Tuner .......................................................................... 6
All Amps On ...................................................................................... 7
Lifting the Ground ............................................................................. 8
Adjusting the Phase.......................................................................... 9
Setups ....................................................................................... 10-11
Specications ................................................................................. 12
Block Diagram ................................................................................ 13
Radial Limited Warranty ...................................................Back Cover
The Tonebone Headlight™ is a compact amp selector that lets you connect your guitar and send the
signal out to as many as four amps at once. The cool thing here is that unlike other switchers that
employ dedicated footswitches to turn on or off amps, the Headlight features a single footswitch that
sequentially rotates through the outputs depending on how many amps are connected. This allows
the Headlight to be used as a typical ABY with two outputs, as a 3-output ABC switcher for clean
rhythm and lead amps or switch between four amps to nd the ultimate tone in the studio.
The second footswitch features two modes whereby it can be used to mute all of the outputs for quiet
on-stage tuning or it can be used to turn all of the amps on at once. This opens the door to greater
creative uses on stage and in the studio alike.
Radial Engineering Ltd. Headlight™ User Guide
1
FEATURES
1 3 6
Made in Canada
2 4 5
INPUT
TUNER
1. INPUT: ¼” input used to connect a
guitar or bass to the Headlight.
2. TUNER: Dedicated separately
buffered ¼” output is always-on,
connects to tuner.
3. OUTPUT-1: Default output and
should always be used as it
provides a safe ground path to the
instrument.
OUT-2 OUT-1
OUT-4 OUT-3
9VDC
4. OUTPUT-2, 3 & 4: Isolated ¼”
outputs used to send signal to
different amps or effects.
5. 9VDC: Power jack for typical 9V
supply or pedalboard power brick
(not included).
6. CLAMP: Ties down the power
supply to eliminate accidental
disconnection.
Radial Engineering Ltd. Headlight™ User Guide
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9VDC
Made in Canada
INPUT
TUNER
OUT-2 OUT-1
OUT-4 OUT-3
FEATURES
10
11 12
9VDC
OUT 3-4 OUT 1-2 IN / TUNER
HEADLIGHT
180º
MUTE
LIFT
ALL ON
GND POL
MUTE
OUT 4 OUT 3 OUT 2 OUT 1
MUTE
9
180º
LIFT
GND POL
LIFT
GND POL
180º
TM
DRAG
MIN MAX
SELECT
8
7. DRAG: Lets you adjust the load
on the pickup for the most natural
tone.
8. SELECT: Heavy duty footswitch
used to cycle through outputs
1 ~ 4 using radio-button style
functionality.
9. MUTE / ALL-ON: Footswitch
7
used to mute the amps for tuning
or can be set to turn all outputs
on at the same time.
10. ALL-ON: Changes the MUTE
footswitch function to ALL-ON
when activated.
11. LIFT: Used to help reduce hum
and buzz caused by ground
loops.
12. 180º: Corrects the relative phase
of one amp to another.
Radial Engineering Ltd. Headlight™ User Guide
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