Space Heater
The Space Heater is an 8-channel analog summing mixer built around 12AX7 vacuum tubes, which can also be used as an eight-channel tube overdrive for individual tracks. It suits studio engineers who want tube colour on single channels or on a stereo mix bus. The model has been discontinued.
- 8-channel 12AX7 vacuum tube overdrive and summing mixer
- Heat switch sets the voltage applied to each tube
- Level and Drive controls per channel
- Individual outputs for use as an 8-channel effects insert
- Transformer-coupled outputs
- Discontinued; part number R800 7050 00
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The Space Heater is an eight-channel unit with a 12AX7 vacuum tube stage on each channel. It can be used in two ways: as an analog summing mixer that combines stems or channels into a stereo output, or as a multi-channel effects device where each channel is sent through its own tube circuit. Level and Drive controls set the amount of saturation, from light warmth to heavy harmonic distortion.
A Heat switch changes the voltage applied to each tube, which alters how hard the tube is driven. Each channel has its own output, so the unit can serve as an eight-channel effects insert on a recording setup. The outputs are transformer-coupled for a vintage character.
Typical uses include adding grit to eight individual tracks, summing stereo stem mixes to a master stereo output, linking several units for larger summing setups, softening the sound of in-ear monitor feeds with tube compression, and driving the tubes hard on drums at the 25-volt setting. The product is discontinued and no longer shipping.
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- Radial Engineering
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- Space Heater
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Audio
- Tube type
- 12AX7 vacuum tube
- Channels
- 8
- Tube stages
- One 12AX7 tube circuit per channel
- Output coupling
- Transformer-coupled
- Tube voltage setting
- Adjustable with Heat switch (25 volts setting for heavy crunch)
Controls
- Level
- Adjustable
- Drive
- Adjustable
- Heat switch
- Adjusts voltage applied to each tube
Outputs
- Individual outputs
- Per channel, usable as an 8-channel effects insert
- Summed output
- Stereo master output via built-in bus
Connectivity
- Linking
- Multiple Space Heaters can be linked together for summing
- Stereo stem summing
- Four stereo stems to one stereo output
Product
- Type
- Analog summing mixer / tube overdrive
- Part number
- R800 7050 00
- Status
- Discontinued, no longer shipping
- Maker
- Radial Engineering
Documentation
- Resources
- User Guide and Smart Sheet available