Radial Engineering
Radial Engineering Space Heater Analog Summing Mixer
Best analog summing tool for producers seeking vintage console warmth.
Elevate your digital mixes with the Radial Engineering Space Heater Analog Summing Mixer. This 8-channel stereo unit infuses your tracks with the sought-after sonic characteristics of analog summing, tubes, and transformers. Using 12AX7 tubes, it delivers incredible depth and harmonic richness, moving beyond standard DAW summing for that big-console sound. Precisely control the effect, dialing in everything from subtle transformer warmth to rich harmonic distortion with the variable tube overdrive. Ideal for cohesive drum gluing or final stem mixing, it features 8 inserts and transformer-coupled outputs for superior audio quality.
$2224.89
Owner Satisfaction
4.7
/ 5
Category Rank
11
/ 369
#11 in Audio Mixers
Price vs Category Average
+131%
Above average
Channels
82
/ x Analog Summing
Who it's for
- Engineers seeking vintage analog warmth and harmonic character
- Producers needing precise control over saturation levels
- Studio owners prioritizing long-term gear reliability
Who should skip it
- Mix engineers managing large-scale, high-track-count sessions
- Budget-conscious home recordists seeking transparent summing
- Users working in cramped, temperature-sensitive studio spaces
Performance breakdown
Harmonic Saturation
12AX7 tubes deliver authentic, rich analog character to sterile digital tracks.
Summing Depth
Provides the cohesive, three-dimensional soundstage typical of high-end vintage consoles.
Voltage Versatility
Three selectable voltage settings offer distinct textures from subtle to aggressive.
Workflow Integration
Eight dedicated inserts allow for seamless outboard gear routing during mixing.
Build Integrity
Rugged construction ensures reliable performance in demanding studio environments.
Output Character
Transformer-coupled outputs impart a classic, musical warmth to the final signal.
Key Specs
Channels
8 x 2 Analog Summing
Tube Type
12AX7
Tube Operation Voltages
35V, 70V, 140V
Outputs
Transformer-coupled
Inserts
8
Model Number
R800 7050 00
Digital or Analog
Analog
Control Type
Rotary Knobs
Features
- 8-channel stereo analog summing mixer
- Adds depth via 12AX7 tube saturation
- Variable tube overdrive control
- Transformer-coupled outputs for warmth
- Enables analog summing workflow
- Includes 8 dedicated inserts
- Achieves 'big console' sound
- Adjustable tube operation voltages
What customers say
Engineers overwhelmingly value the Space Heater for injecting authentic analog character into digital mixes. Its tube saturation circuit is highly praised for adding depth, width, and harmonic richness, effectively gluing tracks together. Users can dial in everything from subtle warmth to aggressive distortion, making sterile recordings sound more organic, especially drums and bass. Reviewers consistently note Radial's legendary build quality, confirming its status as a reliable, long-term investment. While the premium price and need for careful gain staging present a learning curve, the consensus is that this specialized tool delivers exceptional, high-end sonic results for those committed to analog tone.
Know before you buy
Unlike digital summing, which is mathematically precise, the Space Heater routes your audio through physical 12AX7 tubes and transformers. This adds harmonic saturation, depth, and a cohesive 'glue' that mimics the sonic character of a high-end analog console.
The three voltage settings—35V, 70V, and 140V—allow you to change how the tubes react to your signal. Lower voltages provide more aggressive, gritty distortion, while higher voltages offer more headroom and a cleaner, punchier sound.
Yes, the unit features 8 dedicated inserts, allowing you to patch in your favorite compressors, EQs, or other outboard processors before the signal hits the summing stage.
No, the Space Heater is designed as a desktop unit and is not rack-mountable. You will need to ensure you have sufficient desk space for the unit and its cabling.
No, the unit does not require phantom power or USB. It is a purely analog device that connects to your interface via standard line-level inputs and outputs.
No, the Space Heater is an analog summing mixer designed for line-level signals coming from your interface. It does not have microphone inputs or the gain staging necessary for recording microphones.
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$2225