Radial HeadLoad Speaker Attenuator and Simulator

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Product Highlights

Product Description

The Headload is a combination load box and attenuator that is capable of handling up to 130 watts RMS of continuous power and peaks of 180 watts. Inserted between the head and cabinet, it allows the guitar amp to be driven hard while reducing the output level to reduce the sound pressure on stage or provide the means for quiet recording in the studio. This enables the artist to optimize the tone from the guitar amplifier without having to perform at ear-blistering levels.

Radial HeadLoad Speaker Attenuator and Simulator Features
  • Combination speaker attenuator and simulator
  • Safely handles up to 130 watts RMS (180 peak)
  • Radial JDX Reactor and Phazer for direct recording
  • Delivers great tone from your amp at low volume
The 100% discrete fan-cooled design begins with a series of cement encrusted, epoxy coated copper resistor coils that are controlled via a 6-position rotary switch to set the desired power reduction from 100% down to 20%. A trim control provides fine adjustment when below 20%. The Headload output can be turned off for quiet on-stage use, recording or when practicing using the built-in headphone amplifier.

In order to ensure greater consistency from gig to gig, the Headload is equipped with a Radial JDX Reactor direct box. This captures both the signal from the head plus the reactive load from the speaker cabinet for a more natural tone. The JDX has gained tremendous popularity with users as diverse as Megadeth, Aerosmith, Rascal Flatts, Sting and Radiohead.

For engineers that prefer to combine a direct feed with a microphone, the Headload has also been equipped with a Radial Phazer – phase adjustment tool. This lets you time-align the JDX direct feed with the microphone to deliver incredibly natural tones, or when pushed to extreme, create over the top effects. The JDX direct output may also be tailored to suit with a 6 position voicing switch to select from various cabinet emulation presets and fine-tuned using a 2-band EQ to tame overly bright amps.

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Helpful Info about the Manufacturer
Phone:  604-942-1001 Warranty:  3 Year Transferrable

Product Specifications

Radial HeadLoad Speaker Attenuator and Simulator Specifications
  • Audio Circuit Type: Reactive attenuation circuit with active equalization
  • Frequency Response: 90Hz at -3dB to 4KHz at -6dB
  • Low EQ: +/- 9dB @ 80Hz
  • High EQ: +/- 9dB @ 6Khz
  • Low and high resonance: 60Hz and 6.5KHz, shelving filter 6dB/octave slope
    • +12dB at 20% load setting
    • +9dB at 40% load setting
    • +6dB at 60% load setting
    • +3dB at 80% load setting
    • None at 100% load setting
  • Headphone output power: 400mW into 32 ?
  • Headphones impedance: 32 ? or higher recommended
  • Gain: -40dB typical
  • Intermodulation Distortion: <0.05%
  • Noise: -104dbu Unweighted
  • Input Impedance: 8 ?
  • Output Impedance: 250 ?
  • Total Harmonic Distortion: <0.05%
  • Gain Reduction: Variable from 100% to 0%
  • Equalization: Low and high frequency shelving
  • Load: Available in 4 ?, 8 ?, and 16 ?
  • Power: Radial +/-15V 400mA power supply
  • Construction: 14 gauge steel chassis and outer shell
  • Finish: Durable powder coat
  • Dimensions: (L x W x D) 6.05" x 12" x 3.45" (154mm x 305mm x 87.6mm)
  • Weight: 8lbs. (3.63kg)
  • Conditions: For use in dry locations only between 5°C and 40°C

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