Radial Engineering Head Load User Manual

Tonebone± Smart Sheet

Headload - Order # R800 7058

Headload± g u i ta r a m p l o a D b oX

The Headload is a combination load box and direct box with a built-in Phazer™ that lets you
time align the direct feed with the guitar amp mic. Able to handle up to 120 watts, the Headload
lets you reduce the output level on stage while you get maximum tone from your amp. A six
position attenuator can also go to zero for quiet on-stage use or recording. The JDX™ direct

box output features a multi-stage lter that emulates the sound of a 4 x 12 cabinet. This is

used to feed the PA system and monitors, providing a very consistent tone night after night.
Combining the direct and mic’d signals delivers unmatched tone for the most demanding artist.

Six cabinet simulations are offered along with low and high EQ to ne tune the tone to taste.
Choice of 4, 8 and 16 Ohm models are available along with optional 19” rack mount kit.

Features

• 120W load box with six attenuator settings

• Radial JDX direct box output with six cabinet tones

• Built in Phazer to time-align the JDX out with a mic

• Front panel tone controls to adjust tone

Benets

• Get the best tone at low stage volumes

• Amazing natural tone from JDX out

• Works great live and in the studio

• Brings in-ear monitors to life!

Cool Stuff

• Built-in headphone amp for practicing

• Can be 19” rack mounted with optional kit

• Multiple outputs for patching

• Resonantlterstooptimizestageampsound

Dimensions (W x D x H)

• 12” x 6” x 3.5” (154mm x 89mm x 87mm)

• 3 Year transferable warranty

• Includes 15VDC power supply

RESONANCE - Enhances
the EQ curve on the stage
amp to compensate when the

speaker level is reduced.

RANGE - Lets you ne-tune

the power level when set
below 20%.

LOAD - Six-position switch sets the power

reduction from 100% down to OFF.

PRE EQ - Balanced isolated
output captures the sound
from the JDX, but before the
EQ used to feed the PA.

HANDLE - Removable for

rack mounting with optional
mounting kit.

LOW/HIGH - Shelving

EQ used to ne-tune

the JDX DI box output.

FAN - Used to
cool the Headload

and keep it from

overheating.

HEADPHONE - Headphone
output with level control for
quiet practicing.

PHAZER - Phase adjustment tool

with variable 360º analog phase shift.

VOICING - Rotary switch lets you choose
between six cabinet emulation curves.

FROM AMPLIFIER -

¼” jack used to connect
from the guitar amplier

output to the Headload.

TO SPEAKER A/B -

¼” jack used to

connect from the
Headload tot he

guitar amp speaker

cabinet.

• Rack Mount Kit

• Optional 19” rack rail adaptors let you
rack-mount the Headload.

POST EQ - Balanced output
captures the sound after the
EQ is used for feeding stage
monitors or in-ear monitors.

Amazing tones by combining Headload with a mic

For the absolute best tone, combine the direct feed from the JDX with a

mic and then phase align the two signals using the built-in Radial Phazer.
Be prepared for madness!

Radial Engineering Ltd. • Tonebone Smart Sheet © Copyright 2015 all rights reserved · www.radialeng.com · email [e-mail] • Subject to change without notice • Made in Canada

UNBAL-1 - Direct
feed from the amp
used to send a pre­JDX signal.

UNBAL-2 - Post
JDX and EQ feeds
additional gear after
it’s been processed.

LEVEL - Used
to set the two
unbalanced
output levels.

Using the Headload to record without any sound

Use the Headload as a ‘dummy load’ by turning the speakers off and re­cord in complete silence via the built-in Radial JDX Reactor. Works great

on guitar and bass!