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Headload Specifications

The Headload is a device that is intended to simulate the sound of a guitar cabinet and allow the user to compensate for the sound depending on the level that is being produced. That said, the following specifications do not provide any truly significant information as it is completely dependent on the amplifier and speaker cabinet in use. As such, we ask you to please review with the awareness that these measurements are truly subjective in nature. The Radial Headload is quite likely the most useful load box ever made.

Specifications
Audio circuit type: Passive attenuation circuit with active equalization
Gain: -40dB typical
Total harmonic distortion: <0.05%
Intermodulation Distortion: <0.05%
Input Impedance: 8 Ω
Output Impedance: 250 Ω
Noise: -104dbu Unweighted
Features
180° polarity reverse, Ground lift, HPF, LPF, Level Control, Phase Adjustment, Speaker filter, Headphone
Input Connectors: From Amp 1/4"
Output Connectors: XLR & 1/4" Pre and Post JDX, To Speaker 1/4"
Extras: Headphone output
General
Construction: 14 gauge steel chassis & outer shell
Size (L x W x D): 6.05" x 12" x 3.45" (154mm x 305mm x 87.6mm)
Weight: 8lbs. (3.63kg)
Shipping size (L x W x D): 8" x 14" x 5" (203mm x 365mm x 127mm)
Shipping weight: 10lbs. (4.5kg)
Power: Radial +/-15V 4-Pin 500mA power supply
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable

Frequency Response

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Headload Resources

  • Model:
  • V4
  • V8
  • V16
  • Part No:
  • R800 7054 00
  • R800 7058 00
  • R800 7056 00