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Radial (R800 3001) Direct Box (R800 3001) - Active

With 48V phantom power

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Item Number 
Vendor Part
R800 3001

The choice of engineers around the world

Radial’s J48 active DI is the choice of engineers around the world! The J48’s unique phantom powered DC-to-DC transformer isolated switching power supply provides amazing headroom while eliminating ground loops, hum and buzz. The Jensen® transformer-equipped JDI from Radial handles high-output, active instruments with a musicality that audio engineers love! The welded I-beam construction insures that this direct box will stand the abuse the road can throw at it. By employing a unique switching power supply, the J48 is capable of peak transients to 9 volts without choking. The result is lower harmonic distortion, half the inter-modulation distortion and significantly improved dynamics over other DIs.


  • Active 48-Volt phantom powered direct box
  • Minimal power draw with high rail voltage
  • Will not choke when driven hard
  • Low inter-modulation distortion

Specifications for the Radial (R800 3001) Direct Box

{ "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:" : "+10° at 20Hz

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