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The Headload Prodigy from Radial Engineering is a combination DI / load box designed for electric guitars. Using this device allows you to drive your amplifier's power-amp circuit at higher output levels while producing a lower volume on the stage, resulting in all the fat tonal characteristics you want at significantly lower volumes. You can achieve this by inserting the load box as an attenuator between your amplifier head and your cabinet, utilizing the 50% speaker output to achieve a 50% reduction of volume—with no compromise on preamp/power-amp tone.
But that's not all: The Headload Prodigy also functions as a DI box, complete with a JDX balanced XLR output which simulates the tone of a 4x12" cabinet. Using this option, you can record your amp's tone without a microphone, or send your amp through the house's PA and save yourself from having to schlep your speaker cabinet to the gig. You can also take an uneffected DI sound through the unbalanced pre-EQ 1/4" output.
Auxiliary Unbalanced Outputs
Two unbalanced 1/4" outputs—one pre-EQ, one post-EQ—provide more connectivity options to amps, effects, and more
High and Low EQs allow you to further tweak your sound—especially useful for in-ear applications
Headphone Out with Level Control
Monitor privately with this 1/4" line out
Three Separate Uses
100% pass-through allows you to send your amp's sound through a Radial JDX balanced DI output without affecting your stage cabinet's tone
50% attenuation allows you to reduce your volume without sacrificing tone (excellent for small venues)
Simple DI output allows you to route amp/cab tone straight to a mixer, PA, or interface without a microphone
Polarity Reverse & Ground Lift
Reverse the phase of your amp to compensate for phase anomalies on stage
Ground lift switch helps eliminate hum and buzz caused by ground loops
In the Box
Radial Engineering Headload Prodigy Load Box with Speaker Simulator
Radial Power Supply
Limited 3-Year Warranty
Table of Contents
Audio Circuit Type
Passive attenuation circuit with active equalization
130 W RMS
Total Harmonic Distortion
-30 dB / -42 dB
Maximum Output Level
@ 1 kHz: +17 dBu
@ 20 Hz: +14 dBu
100%, 50%, 0%
Low: ±9 dB @ 80 Hz
High: ±9 dB @ 6 kHz
400 mW into 32 Ohms
1x 1/4" Hi-Z line output, pre-EQ
1x 1/4" Hi-Z line output, post-EQ
1x XLR line output, 250 Ohms, post EQ
Disconnects pin 1 at the XLR input
Radial ±15 V 400 mA
14-gauge steel chassis and outer shell
For use in dry locations between 41 to 104°F / 5 to 40°C
Dimensions (L x W x H)
10.25 x 5.9 x 3.8" / 260.3 x 149.7 x 95.2 mm
5.3 lb / 2.4 kg
Radial Engineering Headload Prodigy Load Box with Speaker Simulator Review