Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated .

Average Price: $1,961

High-end/Boutique

$100

$501+

Price Tier

Budget

Standard

High-end

Price History

Based on price data from 1 merchant for "Radial Space Heater". Prices shown reflect NEW condition. Tracking began Apr 25, 2026.

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Description

Transform your digital productions into rich, warm analog masterpieces with the Radial Space Heater. This 8-channel stereo summing mixer, equipped with 12AX7 tubes, is the secret weapon for any recording engineer looking to inject depth and harmonic richness into their tracks. The Space Heater isn't just another effects processor; it's a dynamic tool that bridges the gap between sterile digital precision and the warm embrace of analog sound.

With its variable tube overdrive, the Space Heater offers everything from subtle transformer warmth to intense harmonic distortion, making it perfect for gluing together individual drum tracks or polishing your final mix. Its versatile voltage control lets you fine-tune your sound with 35-volt, 70-volt, and 140-volt settings, allowing you to balance gritty overdrive with clean headroom depending on your needs. Whether you're enhancing vocals, adding depth to acoustic instruments, or pushing the boundaries of distortion for creative effects, the Space Heater is your go-to hardware for sonic exploration.

Key Features:

  • 8-channel stereo summing mixer with 12AX7 tubes for enhanced sonic depth
  • Variable tube overdrive for flexibility from subtle warmth to full-on distortion
  • Transformer-coupled outputs for added character and low-noise signal
  • Adjustable voltage modes (35V/70V/140V) for tailored headroom and distortion levels
  • Use as an analog summing mixer or as 4 individual tube saturation modules
  • Compatible with Radial Workhorse and other 500 series racks
  • Sweepable high-pass and low-pass filters for focused tube effects
  • Oversized Jensen transformer for vintage character and a big bottom end
  • Link multiple units for expanded channel counts

FAQs

What is the primary function of the Radial Space Heater?

The Radial Space Heater is a tube-driven summing mixer and distortion unit designed to add warmth and character to audio signals, making it ideal for studio use.

How does the Heat switch on the Radial Space Heater affect the sound?

The Heat switch allows you to set the plate voltage at 35, 70, or 140 volts, which changes the amount of tube saturation and overdrive, giving you control over the warmth and distortion.

Can the Radial Space Heater be used for both mixing and mastering?

Yes, the Radial Space Heater is versatile enough to be used for both mixing and mastering, providing vintage tone and warmth to enhance audio tracks.

What kind of distortion can I expect from the Radial Space Heater?

The Radial Space Heater offers tube overdrive with variable high-pass and low-pass filters, allowing you to focus and shape the distortion to your preference.

Does the Radial Space Heater have a transformer-coupled output?

Yes, the Radial Space Heater features a transformer-coupled output, which contributes to its vintage tone and enhances the harmonic content of the processed audio.

Sweetwater

Sweetwater

Radial Space Heater Tube Summing Mixer Demo by Sweetwater

Video thumbnail for Radial Space Heater Tube Summing Mixer Demo by Sweetwater by Sweetwater

Radial Space Heater Tube Summing Mixer Demo by Sweetwater

Sweetwater

Sweetwater

Video thumbnail for Introducing the Radial Space Heater by Radial Engineering

Introducing the Radial Space Heater

Radial Engineering

Radial Engineering

Video thumbnail for The Radial Space Heater by Radial Engineering

The Radial Space Heater

Radial Engineering

Radial Engineering

Video thumbnail for Space Heater from Radial Engineering by fohtv

Space Heater from Radial Engineering

fohtv

fohtv

Video thumbnail for The Radial Space Heater on Keyboards by Radial Engineering

The Radial Space Heater on Keyboards

Radial Engineering

Radial Engineering

Video thumbnail for The Radial Space Heater on Drums by Radial Engineering

The Radial Space Heater on Drums

Radial Engineering

Radial Engineering

Video thumbnail for The Radial Space Heater on Vocals by Radial Engineering

The Radial Space Heater on Vocals

Radial Engineering

Radial Engineering

Video thumbnail for NAMM 2014 New Radial Space Heater by shnobel

NAMM 2014 New Radial Space Heater

shnobel

shnobel

Reviews

Critic Reviews

Radial Engineering: Space Heater tube-drive & summing box Space Heater 500 tube-drive module | Tape Op Magazine | Longform candid interviews with music producers and audio engineers covering mixing, mastering, recording and music production.

tapeop.com

The Radial Space Heater delivers impressive tube-driven warmth and transformer saturation, making it a versatile addition to any studio setup. Its solid construction and thoughtful design, including a range of inputs and outputs, position it as a robust choice for both tracking and summing. However, the sensitivity of the Drive and Level controls can lead to frustratingly large changes with minor adjustments, potentially complicating the recording process. While it excels at adding character to various sources, its summing capabilities may fall short for those seeking a standalone mixer. Overall, it's a powerful tool that requires careful handling but rewards with rich, vintage tones.

positive

Radial Engineering Space Heater

soundonsound.com

Radial's Space Heater delivers a potent blend of vintage warmth and flexible summing capabilities, making it a standout for those seeking rich analog character in their mixes. With its tube-driven distortion and versatile routing options, it effectively enhances audio texture. However, potential users should be cautious of its output levels, which can soar unexpectedly. While not ideal for those craving pristine clarity, the Space Heater shines as a creative tool for adding grit and personality. Ideal for both tracking and mixing, it’s a worthy addition for musicians looking to elevate their sound.

positive

Radial Space Heater Analog Summing Mixer

mixonline.com

The Radial Space Heater delivers rich, tube-like warmth and versatile analog summing capabilities, making it a standout for those seeking to enhance digital recordings. Its extensive I/O options and individual channel control allow for tailored sound shaping, and it shines particularly during mixing, where its ability to breathe life into mixes is commendable. However, the absence of detents on the controls complicates recalls and matching settings, which can be frustrating in a fast-paced studio environment. While it excels in adding character, the extreme settings may lead to undesirable distortion for some users. Overall, the Space Heater is a powerful tool that, despite a few quirks, offers significant value for musicians looking to elevate their sound.

positive

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Artist usage

Add artist
See how Jordan Rudess uses Radial Space Heater

Jordan Rudess

Keyboardist, Composer

Dream Theater

...
Verified via YouTube

At 13:04 on this rig rundown video, Jordan explains the way he uses the Radial Engineering Space Heater to warm up the digital sound with tubes. This video shows his keyboard rig for Dream Theater's tour 2019.

Genre Usage

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Used With

Based on how musicians on Equipboard use Radial Space Heater, it is most commonly used with the following gear.

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