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Radial Engineering
ProDI Passive Direct Box

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Item: N12-1411

Availability: Out of stock

ProDI Passive Direct Box
ProDI Passive Direct Box ProDI Passive Direct Box ProDI Passive Direct Box ProDI Passive Direct Box

Radial ProDI

The ProDI Passive Direct Box, from Radial Engineering, is a passive DI box featuring a custom transformer both isolation and impedance conversion. The unit is linear from 20Hz to 18kHz, boasts low distortion, almost zero phase distortion, and is optimal for both the studio and the stage. Since the unit is transformer isolated, it effectively eliminates the buzzes and hums that result from ground loops. In terms of features, the ProDI features a -15dB pad, a 1/4” thru input, and a ground lift housed underneath a robust front panel. 

ProDI Features

  • Passive direct box
  • Proprietary transformer for impedance conversion and isolation
  • Linear from 20Hz-18kHz
  • Low distortion and zero phase distortion
  • XLR input
  • 1/4" thru/input
  • -15dB pad
  • Ground lift
  • Protective front panel
  • Heavy-duty construction
  • Baked enamel finish
  • 600 ohm balanced output
  • 2-1/2" x 4-1/4"


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  • Frequency Response:  20Hz to 20kHz (+/-2.5dB)
  • Harmonic distortion:  0.01% (20Hz to 20kHz)
  • Phase distortion:  1 degree at 1Khz / 8 degrees at 20Hz
  • Common mode rejection:  -90dB @ 60Hz
  • Input impedance:  140kOhms
  • Output impedance:  600 Ohms
  • Input pad:  -15dB
  • Size (W x H x D):  2.75” x 4.25” x 1.75" / 70mm x 108mm x 44mm
  • Weight:  1.2lbs / .54kg
  • Construction:  14-gauge steel chassis & shell, baked enamel finish
  • Warranty:  3 year limited warranty

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