Radial Engineering Space Heater
UPC/EAN #676101041336
MPN #R800 7050
$2649.99
Save 16.7%, MSRP $3180.00
Summing mixer, 8 channel with 12AX7 tubes and transformer isolation
The Radial Space Heater is a single space 8-channel tube overdrive that can be used as a stereo summing mixer or as multi-channel studio distortion. Connect it to your digital interface to sum tracks in the analog domain, or use it as a hardware insert to add character to individual channels. With complete control over each tube circuit, the Space Heater can provide everything from subtle transformer warmth to full on harmonic distortion.
The design begins with eight +4dBu balanced line level inputs that feed four 12AX7 tubes wired in stereo. A heat switch on each channel lets you apply between 35, 70 or 140 volts to the tube to modify the performance. When set to a lower voltage; it starves the tube, increasing distortion producing filthy layers of grit. When the voltage is set to maximum; the signal cleans up resulting in natural tube warmth with wonderful harmonic overtones. Separate DRIVE and LEVEL controls let you fine-tune the settings on each channel to increase or decrease distortion to suit. Each of the eight outputs is equipped with an oversized output transformer for beefy character while providing galvanic isolation to eliminate noise. You can also bypass the tube circuit and drive the transformer on its own to produce a vintage feel that is reminiscent of the finest audio designs from yesteryears.
Connections to and from the Space Heater include ¼" TRS and 25-pin D-Sub balanced inputs, balanced ¼" TRS send and receive insert points, and an 8-channel balanced D-Sub output. The send jacks or the D-subs can be used to process individual instruments, enhance a sterile vocal track, add 'grind' to a bass track or 'sparkle' to an acoustic guitar. Used as four stereo pairs, the Space Heater can be used to fatten stereo stems or with in-ear monitor systems to add natural tube compression to create a more enjoyable on-stage experience. All eight channels can be sent to the master left-right XLR outputs for stereo summing with odd channels routed left and even channels routed right. This set up is often used to add crunch to drum kits or for traditional analog (out-of-the-box) summing and can be expanded using the link connectors for 16, 24 or 32 x2 summing requirements. This is supplemented with high-pass filters on each channel that help clean up tracks by removing excessive low frequency resonance.
The Space Heater... a character box with an attitude you will love!
Features
8-channel 12AX7 tube overdrive with summing mixer35, 70 and 140 volt Heat switchChannel outputs allow for use on single tracksTransformer coupled outputs for vintage tone
Specifications
Circuit type : Class A tube gain stage with IC buffersFrequency response : 20Hz - 20Khz, +0/-3dBTotal harmonic distortion : VariableDynamic range : 96dBInput impedance - bypassed : 50k in parallel with your load deviceInput impedance - active : 100kMaximum input : +22dBuGain : +33dB@140V, +29db@70V, +27dB@35VGain - mix bus : 6dB above individual channel outputBypasss : Full bypassClip level - output : +26dBuOutput impedance - balanced outputs : 180Output impedance - headphone out : 15Output impedance - mix bus out : 100Common mode rejection : -70dBu @ 55HzEquivalent input noise : 103dBuNoise floor - maximum gain : -64dBu@140V, -66dBu@70V, -70dBu@35VNoise floor - controls at 50% : -70dBu@140Hz, -72dBu@70V, -76dBu@35VIntermodulation distortion : VariableUnity gain control setting : Drive and Gain at "11 o'clock"
Features
Number of channels : Eight channelsInput connectors : ¼" TRS, DB-25Output connectors : DB-25Insert Connectors : 8 x ¼" TRS Send, 8 x ¼" ReceiveMix bus output : XLRLow pass filter : -5dB @ 40Hz, 6dB/Octave slopeXLR configuration : Pin 2 +, Pin 3 -, Pin 1 GND
General
Power supply (included) : External switching type 100V - 240V AC, 1600mA output with 5 pin XLRConstruction : 14 gauge steel chassis and outer shellFinish : Durable powder coatSize: (L x W x D) 17.5" x 6" x 1.75" (44.5 x15.25 x 1.75cm)Weight : 8.5 lbs (3.8kg)Shipping size: (L x W x D) : 22" x 11" x 5" (55.9 x 27.9 x 12.7cm)Shipping weight : 9.5 lbs (4.3kg)Conditions : For use in dry locations only between 5°C and 40°C
Write a review about the Radial Engineering Space Heater
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5.0
Jeremy Costa - Backward Clock Studio
Sainte-Adele
March 19, 2020
Sounds Fantastic and Versatile AF
As the reviews online seemed fairly limited, I took a chance on this piece. I have used other Radial gear and have always been more than impressed. This unit is no difference, it holds the Radial stamp, and deserves it.
After a few weeks of working with it in different contexts, I can truly say I'm thoroughly impressed.
Read moreAfter a few hours of work, the tubes seemed to break in and sound even more rich and spacious.
This is a great tool for studios with limited budgets when it comes to analog gear. I managed to get a deep and threatening tone out of a VST cello that simply blew my mind.
An important detail that isn't really talked about much on the tech specs or descriptions is that it does function as a passive transformer based summing mixer - simply running audio through the bus with the drives OFF gives a nice clean sum.
I'm giving it 5 stars because this unit really does a lot of work in both the mix and pre-master phase. It is exactly what I needed to add some true analog dimension to my final mix-downs with the added bonus of simply producing rock-solid distortion and grit if required.
A+
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