True to the Music
Radial Engineering Ltd.
Space Heater™ User Guide
1
FRONT P
ANEL
FEA
TURE SET
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.
LEVEL:
Inner control on each
concentric pot sets the output
from the tube drive - acts like a
master volume on a tube guitar
amp.
HEA
T
:
Three position switch
changes the tube voltage for
each pair with 35,70 or 140 V
olt
settings for dif
ferent levels of
distortion.
HEADPHONE LEVEL:
Built
with standard ¼” stereo output.
POWER SWITCH:
T
urn of
f to
conserve tube life and reduce
power consumption and heat.
BUS:
Sends the channel
set to the stereo mix bus
and headphones.
HPF:
High-pass
fi
lter
gently
rolls of
f low frequency
resonance below 40Hz across
both channels on the pair
.
TUBE DRIVE ON:
Routes the
audio signal to the tube drive -
may be bypassed to compare
wet versus dry
.
MIX BUS ON:
T
urns
on the stereeo XLR-M
outputs.
MIX BUS LEVEL
CONTROL:
Used to adjust the summing
mixer output.