True to the Music
Radial Engineering Ltd.
Space Heater™ User Guide
12
Pin #
1
Channel 8 Hot
2
Channel 8 Ground
3
Channel 7 Cold
4
Channel 6 Hot
5
Channel 6 Ground
6
Channel 5 Cold
7
Channel 4 Hot
8
Channel 4 Ground
9
Channel 3 Cold
10
Channel 2 Hot
11
Channel 2 Ground
12
Channel 1 Cold
13
Not Used
Pin #
14
Channel 8 Cold
15
Channel 7 Hot
16
Channel 7 Ground
17
Channel 6 Cold
18
Channel 5 Hot
19
Channel 5 Ground
20
Channel 4 Cold
21
Channel 3 Hot
22
Channel 3 Ground
23
Channel 2 Cold
24
Channel 1 Hot
25
Channel 1 Ground
-
+
1
-
+
G
-
+
G
2
3
-
+
G
-
+
G
4
5
-
G
-
+
G
6
7
-
+
G
-
+
G
8
13
14
25
1
Pin #
1
Channel 8 Hot
2
Channel 8 Ground
3
Channel 7 Ground
4
Channel 6 Hot
5
Channel 6 Ground
6
Channel 5 Ground
7
Channel 4 Hot
8
Channel 4 Ground
9
Channel 3 Ground
10
Channel 2 Hot
11
Channel 2 Ground
12
Channel 1 Ground
13
Not Used
Pin #
14
Channel 8 Ground
15
Channel 7 Hot
16
Channel 7 Ground
17
Channel 6 Ground
18
Channel 5 Hot
19
Channel 5 Ground
20
Channel 4 Ground
21
Channel 3 Hot
22
Channel 3 Ground
23
Channel 2 Ground
24
Channel 1 Hot
25
Channel 1 Ground
+
1
+
G
G
G
G
+
G
2
3
+
G
+
G
4
5
G
+
G
G
G
G
6
7
+
G
+
G
G
G
8
13
OUTPUT D-SUB CONNECTOR
INPUT D-SUB CONNECTOR
1
2
3
4
5
-16VDC
COM
+48VDC
+16VDC
COM
CONNECTOR WIRING
HOT (+)
COLD (-)
GROUND
1
2
3
HOT (+)
GROUND
COLD (-)
XLR Connector
TRS ¼” Phone Connector
5-Pin XLR Power Connector
SPECIFICATIONS
Circuit Type:
Class A tube gain stage with
IC buffers
Frequency response:
20Hz – 20Khz, +0/-3dB
Total Harmonic Distortion:
(THD+N)
Variable
Dynamic range:
96dB
Input impedance – Bypassed:
50k
Ω
in parallel with your load
device
Input impedance – Active:
100k
Ω
Maximum input:
+22dBu
Gain:
+33dB@140V, +29db@70V,
+27dB@35V
Gain - Mix Bus:
6dB above individual channel
output
Bypass:
Full Bypass
Clip Level – Output:
+26dBu
Output impedance - Balanced
Outputs:
180 Ohms
Output Impedance -
Headphone Out:
15 ohms
Output Impedance - Mix Bus
Out:
100 Ohms
Common Mode Rejection
-70dBu @ 55Hz
Equivalent input noise:
-103dBu
Noise
fl
oor - Maximum Gain:
-64dBu@140V, -66dBu@70V,
-70dBu@35V
Noise
fl
oor - Controls at 50%:
-70dBu@140Hz, -72dBu@70V,
-76dBu@35V
Intermodulation distortion:
Variable
Unity Gain Control Setting:
Drive and Gain at “11 o’clock”
Features:
Number of channels:
Eight channels
Input Connectors:
¼” TRS, DB-25
Output Connectors:
DB-25
Insert Connectors:
8 x ¼” TRS Send, 8 x ¼”
Receive
Mix bus output
XLR
Low pass
fi
lter
-5dB @ 40Hz, 6dB/Octave
slope
XLR con
fi
guration:
Pin 2 +, Pin 3 -, Pin 1 GND
General:
Power Supply (Included)
External switching type 100V –
240V AC, 1600mA output with
5 pin XLR
Construction:
14 gauge steel chassis and
outer shell
Finish:
Powder coat
Construction:
14 gauge steel chassis and
outer shell
Size:
17.5” x 6” x 1.75” (44.5 x15.25
x 1.75cm)
Weight:
8.5 lbs (3.8kg)
Conditions:
For use in dry locations only
between 5°C and 40°C
Warranty:
Radial 3-year, transferable
