Radial JDX

JDX Reactor - Guitar Amp Direct Box

Order Code: JDX
Our Price: $255.00

Classic 'RedBox' style guitar DI/head-speaker insert. It's designed to capture the explosive dynamics and warmth of an electric guitar amplifier by connecting between the guitar amp head and speaker cabinet. This delivers a sound that is similar to a well placed microphone while eliminating the frustrating inconsistencies.

The design begins with 100% discrete class-A circuitry and a transformer-coupled 'reactive load' that captures both the sound from the amp head along with the back electromagnetic impulse from the loudspeaker. This produces a more realistic rendering than the usual resistive pad offered by other manufacturers. The signal is then processed via a carefully designed multi-stage filter to emulate the tone of a 4x12 half stack cabinet.

Photo of Radial JDX available from Factory Sound
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  • Captures the sound of the head and the cabinet
  • Delivers consistent tone show after show
  • Works equally well on electric guitar and bass
  • Great for recording direct without a mic

In use, the JDX delivers greater consistency over a typical microphone as irregularities such as mic placement and varying acoustics no longer play the dominant role on stage. This is most appreciated when using in-ear monitors as the tone remains consistent from one show to the next, resulting in shorter setup times and a more comfortable audio feed for the artist.

Although originally designed for guitar, the JDX has also become a favorite on bass. The clarity and punch in the lower mid range delivers a tone that is reminiscent of an Ampeg SVT connected to an 8x10 cabinet. On guitar it sounds as if you have a Shure SM57 in front of a Marshall half-stack.

Audio circuit type: Discrete Class-A - Transformer Isolated
Frequency response: Shaped for Guitar Use
Signal to noise ratio:  
Dynamic range: 114dB
Noise floor: -100dBu below 0dbu
Maximum input: 600W @ 4? 300W @ 8? 150W @ 16?
Maximum output: +14dBu (clip level)
Thermal input limit: +49 VAC (from amplifier)
Total harmonic distortion: <0.015% (+10dBu input @ 1KHz)
Inter-modulation distortion: 0.03% (+10dBu input @ 1KHz)
Input impedance: 15kΩ
Output impedance: 2kΩ (XLR out)
180° polarity reverse: Inverts signal polarity at the XLR output
Ground lift: Disconnects ground at the input transformer
Filter: Active speaker emulation band-pass filter
XLR configuration: AES standard (pin-2 hot)
Power: +15VDC/400mA adapter Included 
Construction: 14 gauge steel chassis and outer shell, baked enamel finish
Size: 127 x 159 x 51mm
Weight: 1.28 kg
Warranty: 3-year