Bring Analog Warmth To Your Tracks
Radial Engineering's Space Heater 8-Channel Tube Drive Summing Mixer is a 1U rack-mountable mixer designed to warm up tracks in digital recording applications and add analog sound character, headroom, and quality to digital mixing. Summing mixer. This unit features four of her 12AX7 dual cathode tubes wired in stereo pairs to drive eight channels. Each channel has its own heat switch that allows you to adjust the B tube voltage from 37, 75 and 150 volts to produce the desired harmonic content and distortion. Setting the space heater to the highest voltage optimizes tube performance for the tube's natural heat. Lowering the voltage gives you a creamy, smooth distortion.
Each of the 8 channels is transformer-coupled for added character, providing excellent immunity to hum and hum caused by ground loops. For recordings that prefer a classic, resistant summer sound, the tube drivers can be bypassed on each channel. Master left and right busses allow all 8 channels to be mixed to stereo and monitored via the built-in headphone amplifier. Eight balanced 1/4" TRS inputs with individual sends and returns are routed to two 25-pin D-Sub connectors for ample connectivity. And with stereo LINK, you can easily expand to 16, 24 or even 32 channels.
Space Heater is great for warming up vocals, adding bite to bass, or creating crashing drum tracks. When used live, in-ear monitors provide a more natural sound without resorting to dull compression.
Radial SPACE HEATER 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
- 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 Floor: @ Max Gain: -64dBu @ 140V, -66dBu @ 70V, -70dBu @ 35V
- Maximum Input: +22dBu
- LPF
- Input Connectors: 1/4" TRS, D-Sub
- Output Connectors: XLR, 1/4" TRS, D-Sub
- Construction: 14 gauge steel chassis and outer shell
- Size (L x W x D): 5" x 6" x 1.75" (44.5cm x 15.25cm x 4.45cm)
- Weight: 5lb (3.8kg)
- Power: External switching type 100V – 240V AC, 1600mA output with 5 pin XLR
Radial Space Heater Downloads
Manual - As of 4/10/2023
Product documents are provided as a courtesy and may not reflect the most up-to-date information. Please contact us for the most up-to-date information.