Radial JDX 48

Guitar Amplifier Direct Box


Radial JDX 48

The Radial JDX 48 is a direct box designed to capture the sound of an electric guitar amplifier by connecting the amp head and the speaker cabinet, providing a balanced feed for the PA system that sounds like a well-placed microphone on your amp.

  • Capture the sound of your amplifier through a direct box
  • Delivers consistent tone across every performance
  • Works equally well on electric guitar and bass
  • Can be powered from 48V phantom or DC supply

Deliver your amp’s tone through the PA

The JDX 48 makes it easy to get a consistent and natural amplifier tone through the PA system night after night, by taking a feed directly from your amplifier and employing Radial’s popular JDX speaker emulation that produces an effect similar to placing a dynamic microphone in front of a 4×12 half stack cabinet. This gives you a more manageable sound onstage for gigs where feedback is an issue, or if micing your amp isn’t an option. For artists that employ in-ear monitoring systems, the JDX 48 provides a consistent tone each night in the monitor mix for shorter setup times and a more comfortable audio feed for the artist.

Dual powering options

The JDX 48 can be powered using 48V phantom power from the mixing console, for a cleaner setup on stage that eliminates the need to carry a power supply to the gig. However, for times when phantom power may not be available, the JDX 48 also ships with a separate DC power supply – giving you a redundant powering option so you never have to perform without your JDX.

Audio circuit type: Discrete Class-A – Transformer Isolated
Frequency response: Shaped for guitar use
Dynamic range: 114dB
Total harmonic distortion: <0.015% (+10dBu input @ 1KHz
Intermodulation Distortion: 0.03% (+10dBu input @ 1KHz)
Input Impedance: 15kΩ
Output Impedance: 2kΩ (XLR out)
Noise: -100dBu below 0dBu
Maximum Input: 120W @ 8Ω
Maximum Output: +14dBu (clip level)
180° polarity reverse, Ground lift
Input Connectors: One 1/4″ input
Output Connectors: One XLR output, one 1/4″ output
Extras: Bass extension lowers frequency response for bass guitar, 300W amp increases power handling from 100W to 300W, Active speaker emulation band-pass filter
Construction: 14-gauge steel chassis and outer shell
Size (L x W x D): 6.25″ x 5″ x 2″ (159 x 127 x 51mm)
Weight: 2.80lbs (1.28 kg)
Power: 48V phantom or +15VDC/400mA adapter Included
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable


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