Space Heater™ - Specifications

The Radial Space Heater is an analog summing mixer and studio grade 12AX7 tube overdrive. Its built-in features and routing capabilities allow it to be used in a number of ways. The Heat setting (plate voltage for the tube) as well as the position of the Drive and Level controls will all have an impact on the specifications as we have shown here. The Space Heater can run clean, or run dirty. For a detailed explanation of the Space Heater's functionality, please refer to the "Using" page.

Circuit Type:  Class-A tube gain stage with IC buffers
Frequency Response: 20Hz – 20Khz, +0/-3dB
Total Harmonic Distortion:  Variable
Dynamic Range:  96dB 
Input Impedance – Bypassed:  50kΩ in parallel with your load device
Input Impedance – Active:  100kΩ
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:  180Ω 
Output Impedance - Headphone Out:  15Ω 
Output Impedance - Mix Bus Out:  100Ω 
Common Mode Rejection:  -70dBu @ 55Hz 
Equivalent Input Noise:  103dBu
Noise Floor - Maximum Gain:  -64dBu @ 140V, -66dBu @ 70V, -70dBu @ 35V
Noise Floor - Controls at 50%:  -70dBu @ 140Hz, -72dBu @ 70V, -76dBu@35V
Intermodulation Distortion:  Variable
Unity Gain Control Setting:  Drive and Gain at "11 o'clock"
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 Filter: -5dB @ 40Hz, 6dB/Octave slope
XLR Configuration: Pin 2 +, Pin 3 -, Pin 1 GND
Power Supply (Included):  External switching type 100V – 240V AC, 1600mA output with 5 pin XLR
Construction:  14 gauge steel chassis and outer shell
Finish: Durable powder coat
Size (L x W x H): 17.5" x 6" x 1.75" (44.5cm x 15.25cm x 4.45cm)
Weight:  8.5lb (3.8kg)
Shipping Size (L x W x H): 22" x 10.375" x 4.5" (55.9cm x 26.4cm x 11.4cm)
Shipping Weight: 9.5lb (4.3kg)
Conditions: For use in dry locations only between 5°C and 40°C
Warranty:  Radial 3-year, transferable
Specifications are subject to change without notice.