Radial Space Heater Summing mixer, 8 channel with 12AX7 tubes and transformer isolation
Vendor: Radial
Available

Radial Space Heater Summing mixer, 8 channel with 12AX7 tubes and transformer isolation
8-Channel Summing Mixer & Tube Drive
The Radial Space Heater is an 8-channel tube overdrive that is professionally designed to be used as an analog summing mixer or as a multi-channel studio effects device, capable to utilize the tube circuitry for a range of effects from subtle warmth and grit to full harmonic distortion.
The Radial Space Heater is an analog summing mixer and studio grade 12AX7 tube overdrive. It comes with a built-in features and routing capabilities that are allowing 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 surely will have an impact on the specifications as we have shown here. The Radial Space Heater can run clean, or run dirty.
Warm up your digital tracks
The Radial Space Heater is a high performance summing mixer that is allowing you to blend tracks out-of-the-box in the analog domain, with oversized output transformers and vacuum tubes for vintage warmth and character. Eight mono input channels or four stereo pairs are available, with a heat switch on each pair to adjust the voltage on the 12AX7 tube - lower voltage settings starve the tube for a more pronounced distortion effect. Separate Drive and Level controls on each channel are giving the you complete control over each tube circuit, provides a range of tones that are allowing you to fatten up digital stems or provide a distorted effect on vocals, guitars or drums.
Features
- 12AX7 vacuum tube overdrive & summing mixer
- Heat switch adjusts voltage applied to each tube
- Individual outputs to use as an 8-channel effects insert
- Transformer-coupled outputs for vintage tone
Specifications | ||
---|---|---|
Audio circuit type: | Class-A tube gain stage with IC buffers | |
Number of channels: | 8 | |
Frequency response: | 20Hz – 20Khz, +0/-3dB | |
Dynamic range: | 96dB | |
Gain: | +33dB@140V, +29db@70V, +27dB@35V | |
Clip Level: | +26dBu | |
Input Impedance: | Bypasses: 50kΩ in parallel with your load device | Active: 100kΩ | |
Output Impedance: | Balanced Output: 180Ω | Mix Bus: 100Ω | |
Common Mode Rejection Ratio: | -70dBu @ 55Hz | |
Equivalent Input Noise: | 103dBu | |
Noise: | @ Max Gain: -64dBu @ 140V, -66dBu @ 70V, -70dBu @ 35V | |
Maximum Input: | +22dBu | |
Features | ||
LPF | ||
Input Connectors: | 1/4" TRS, D-Sub | |
Output Connectors: | XLR, 1/4" TRS, D-Sub | |
General | ||
Construction: | 14 gauge steel chassis and outer shell | |
Size (L x W x D): | 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 D): | 22" x 10.375" x 4.5" (55.9cm x 26.4cm x 11.4cm) | |
Shipping weight: | 9.5lb (4.3kg) | |
Power: | External switching type 100V – 240V AC, 1600mA output with 5 pin XLR | |
Conditions: | For use in dry locations only between 5°C and 40°C | |
Warranty: | Radial 3-year, transferable |