Radial JDX Direct-Drive

Guitar Amp Simulator & DI Box



The Radial JDX Direct-Drive is a unique and powerful device that emulates the sound of a guitar amplifier while doubling as a direct box, providing a realistic amp sound that allows you to play a gig without needing an amp on stage.

  • Guitar amp simulator for pedalboards
  • Eliminates need to bring an amp to the gig
  • 4 x 12 half-stack & open back combo tones
  • Employs Radial’s popular JDX tone shaping

Classic amp tones in a compact pedal

The Direct-Drive is an amp simulator designed for your pedalboard, providing a realistic amp tone that can be connected directly to the PA system. Three amplifier voicing options are provided: the first is the popular JDX tone which simulates the sound of an SM57 microphone on a 4×12 cabinet. The second setting is similar in character to a British tube head amplifier, while the remaining tone is modeled after a clean twin combo amp. With three classic voicings available, the Direct-Drive provides a natural amp tone through the PA system and consistency from night to night.

In many ways, printing out the specifications of the JDX Direct-Drive is a moot point. The Radial JDX Direct-Drive has been designed to ‘sound good’ by emulating the sonic character of iconic guitar amps. In other words, the Direct-Drive sound has absolutely nothing to do with a ‘flat frequency response’ or the typical specifications that engineers will consider. It is, in fact, the opposite. We have however taken the time to minimize distortion so that the Direct-Drive delivers the signal correctly without introducing noise. We also felt it worthwhile to show you the resulting EQ curves so you can get a first-hand view of how we will ruin your sound! Have fun!

Audio circuit type: Class-A BiFET input buffer with electronic frequency shaping circuitry
Frequency response: Shaped for guitar use
Dynamic range: 83dB to 100dB
Clip Level: > +5dBu
Intermodulation Distortion: >0.1 @ -15dBu Out
Output Impedance: 600 Ohms (XLR) 100 Ohms (1/4″)
Noise: -78dBU
Maximum Input: > +5dBu
180° polarity reverse, Ground lift, Speaker filter
Input Connectors: 1/4″
Output Connectors: 1/4″ thru and amp tone output, XLR
Extras: Always on Tuner Output
Construction: 14-gauge steel chassis and outer shell
Size (L x W x D): 4.75″ x 3.625″ x 2″ (121 x 92 x 51mm)
Shipping weight: 1.6 lbs. (.7 kg)
Power: 40mA, 9VDC (center pin negative)
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable


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