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Radial EngineeringSpace Heater 500 Series Tube Drive

Item#
N13-4481
$699.99

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Radial Space Heater

The Space Heater 500 from Radial Engineering is a studio quality tube distortion built in the 500 series format. It produces everything from gentle warm breakup to fat heavy distortion.

Designed to be used with the Radial Workhorse, or any 500 series rack or case, the Space Heater 500 is built around a 12ax7 tube. Featuring controls for Level, Drive, Heat (voltage starve selection), High Cut, Lo Cut, and Pre/Post/Off EQ selection, the Space heater 500 series allows users to dial in the perfect amount of tube warmth or rich harmonic distortion.

Space Heater Features

  • Studio grade 12AX7 tube overdrive
  • 35, 70 & 140 volt Heat switch to set plate B+ voltage
  • Transformer coupled output for vintage tone
  • Variable HPF & LPF filters to focus distortion
  • Circuit type: Thermionic Gain stage with solid state input and output buffers
  • Frequency response: 20Hz - 20KHz ± 1dB
  • Total harmonic distortion: Varies with Drive and Level settings
  • Dynamic range: 92dB
  • Input impedance – bypassed: 50K
  • Input impedance – active: 1M
  • Maximum input: +20dBu
  • Maximum gain: [email protected], 27dB @70V, 13dB @35V
  • Clip level - output: +22dBu 
  • Output impedance: 100Ω 
  • Equivalent input noise: -102dBu 
  • Noise floor: -70dBu 
  • Intermodulation distortion: Varies with drive and level settings 
  • Common mode rejection ratio: -60dB
  • Unity gain control position: Drive & level at about 11 o'clock
  • Construction: 500 Series module
  • Finish: Durable powder coat
  • Size: (W x H x L) 5.3" x 1.6" x 6.7" (134mm x 40mm x 170mm)
  • Weight: 1.55lb
  • Shipping size: (W x H x L): 6.7" x 1.9" x 9.1" ( 170mm x 48mm x 231mm)
  • Shipping weight: 2lb
  • Conditions: For use in dry locations only between 5°C and 40°C
Radial Engineering Space Heater 500 Series Tube Drive Reviews