Radial Engineering Space Heater User's Guide
True to the Music
Radial Engineering Ltd.
1588 Kebet Way, Port Coquitlam BC V3C 5M5
tel: 604-942-1001 • fax: 604-942-1010
www.radialeng.com
email: info@radialeng.com • web: www.radialeng.com
Specifi cations and appearance are subject to change without notice.
Copyright © 2015 Radial Engineering Ltd.
www.radialeng.com
THIS PAGE INTENTIONALY LEFT BLANK
True to the Music
Radial Space Heater
Table of Contents .....................................................................................................Page
Front Panel Feature Set Overview ......................................................................................................................1
Rear Panel Feature Set Overview .......................................................................................................................2
Introduction To The Space Heater .......................................................................................................................3
Understanding The Signal Flow ..........................................................................................................................4
Features And Controls .........................................................................................................................................5
Connectivity .........................................................................................................................................................6
Master Section.....................................................................................................................................................7
Using As A Summing Mixer .................................................................................................................................8
Space Heater Applications ............................................................................................................................ 9-10
Changing the Tubes .......................................................................................................................................... 11
Specifi cations and Connectors ..........................................................................................................................12
Radial Limited Warranty ..................................................................................................................... Back Cover
Congratulations on your purchase of the Radial Space Heater™ Summing Mixer and Tube Overdrive. The Space
Heater is a studio-grade tube distortion unit and detailed analog mixer with personality. This manual covers the
setup and operation of the Space Heater in both the studio and live sound. Please take a few minutes to read
through this manual in order to familiarize yourself with the Space Heater’s features and applications. Inside you
will fi nd important safety features along with tips on how to get the most out of your Space Heater.
Should you have any questions on an application not covered in this manual, we invite you to log onto the Radial
Engineering website at radialeng.com to check the Space Heater’s FAQ section for the latest updates. If you still
do not fi nd what you are looking for, feel free to send us an email at info@radialeng.com.
Now lets get started warming things up… or let your destructive side shine!
!
Note: The Radial Space Heater is solely intended for use by audio professionals. These professionals
are expected to be familiar with safety issues regarding electrical systems and sound pressure levels that
could cause ear damage after extended exposure. If you are not familiar with these, please contact your
local electrical and health authorities as Radial has no means to ensure products like the Space Heater
are being used according to local rules and regulations.
IMPORTANT SAFETY & USER NOTICE - FOR PROFESSIONAL USE ONLY
Radial Engineering Ltd. Space Heater™ User Guide
MIX BUS LEVEL CONTROL:
Used to adjust the summing
mixer output.
MIX BUS ON: Turns
on the stereeo XLR-M
outputs.
True to the Music
POWER SWITCH: Turn off to
conserve tube life and reduce
power consumption and heat.
HEADPHONE LEVEL: Built
with standard ¼” stereo output.
TUBE DRIVE ON: Routes the
audio signal to the tube drive -
may be bypassed to compare
wet versus dry.
HPF: High-pass fi lter gently
rolls off low frequency
resonance below 40Hz across
both channels on the pair.
BUS: Sends the channel
set to the stereo mix bus
and headphones.
HEAT: Three position switch
changes the tube voltage for
each pair with 35,70 or 140 Volt
settings for different levels of
distortion.
LEVEL: Inner control on each
concentric pot sets the output
from the tube drive - acts like a
master volume on a tube guitar
amp.
FRONT PANEL FEATURE SET
Radial Engineering Ltd.
ON: Used to turn on (or
bypass) each of the four
channel sets.
DRIVE: Outer control on
each concentric pot sets the
level going to the tube drive
circuit.
1
Space Heater™ User Guide
True to the Music
INPUT (1-8): Eight ¼” TRS
balanced inputs for easy
connection to the Space Heater.
14-GUAGE STEEL: Heavy duty
construction eliminates stress on
the PCB and provides excellent
shielding against magnetic fi elds.
D-SUB INPUT (1-8): DB25
connector follows the Tascam/
Protools standard and is wired in
parallel to the ¼” input jacks.
SEND (1-8): Eight ¼” TRS
balanced sends feed the post tube
signal to an external processor or
may be used as additional outputs
for parallel processing.
STEREO SUM OUTPUTS:
Provide left and right summed
outputs for the most luxurious
old school analogue character.
RECV: Eight ¼” TRS balanced
receive jacks bring the signal
back to the Space Heater and
routes it to the D-Sub output or
stereo mix bus.
D-SUB OUTPUT (1-8): DB25
connector used to send all eight
+4dBu transformer isolated
channels back to the mixing
console or workstation.
GROUND LIFT: Recessed
switch lifts pin-1 on the two
XLR outputs to help reduce
hum and buzz caused by
ground loops.
REAR PANEL FEATURE SET
Radial Engineering Ltd. Space Heater™ User Guide
LINK: Stereo ¼” TRS link used
to combine two or more Space
Heaters together for 16x2, 24x2
or 32x2 tube summing.
POWER: 5-pin locking XLR
connection for external
power supply.
2
Loading...