Radial Engineering HEADLIGHT User Manual

Guitar amp Selector

Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5

Tel: [phone] • Fax: [phone] • Email: [e-mail]

Radial Engineering Ltd. Headlight™ User Guide

1

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

Specications ................................................................................. 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.

9VDC

Made in Canada

INPUT

TUNER

OUT-2 OUT-1

OUT-4 OUT-3

Radial Engineering Ltd. Headlight™ User Guide

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FEATURES

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.

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.

1 3 6

2 4 5

9VDC

Made in Canada

INPUT

TUNER

OUT-2 OUT-1

OUT-4 OUT-3

MUTE

TM

HEADLIGHT

LIFT

GND POL

180º

OUT 4 OUT 3 OUT 2 OUT 1

DRAG

MUTE

ALL ON

OUT 3-4 OUT 1-2 IN / TUNER

LIFT

GND POL

180º

LIFT

GND POL

180º

SELECT

MUTE

MIN MAX

9VDC

Radial Engineering Ltd. Headlight™ User Guide

3

FEATURES

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
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.

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11 12

7

9

10