Radial J48 Active 48-Volt Phantom Powered DI Box

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Sale price $249.99 USD

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Radial J48 Active 48-Volt Phantom Powered DI Box

Phantom Powered Active Direct Box. 

The J48™ is an active direct box that has been optimized to handle extreme transients without distortion, with a linear frequency response that extends from 20Hz up to 40kHz.


  • Exceptional headroom & dynamic range
  • Retains the natural sound of the instrument
  • Merge switch sums stereo instruments to mono
  • Powered by 48V phantom, no batteries required
  • 15dB Pad: reduces the input sensitivity for active basses and high output keyboards.
  • 48V Check: flashes once when the 80Hz filter is depressed to confirm 48V phantom power is present.
  • Merge: changes the input and thru-put to two LR inputs and mixes the output to mono at the XLR.
  • Input: instrument input connection to the J48.
  • Thru: throughput from the J48 to the amp. Hi impedance will not load instrument down.


  • Audio circuit type: Proprietary analog circuit with low-noise op-amp
  • Frequency response: 20Hz ~ 20kHz
  • Dynamic range: 109dB
  • Total harmonic distortion: 0.002% @ -5dBu
  • Intermodulation Distortion: 0.003% @ -3dBu
  • Phase Deviation: +10º at 20Hz | 0º at 1kHz | -1º at 20kHz
  • Input Impedance: 220k? - ¼" input
  • Output Impedance: 200? - XLR output
  • Equivalent Input Noise: -103dBu
  • Noise: -99dB below 0dBu
  • Maximum Input: +10dBu
  • Input pad, Mono Sum, 180° polarity reverse, Ground lift, HPF
  • Input Connectors: 1/4"
  • Output Connectors: Balanced XLR, 1/4" Thru
  • Construction: 14 gauge steel chassis and outer shell
  • Size (L x W x D): 3.3" x 5.0" x 2" (84 x 127 x 48mm)
  • Weight: 1.55 lb (720 g)
  • Power: 48V phantom - proprietary digital switching
  • Conditions: For use in dry locations only between 5°C and 40°C
  • Warranty: Radial 3-year, transferable


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