PDB4 – 4-Channel Passive Direct Box



  • Art Pro Audio
Availability: In Stock
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SKU: 11345 Category:


The PDB4 is a four channel passive direct box that features four quality fully transformer isolated direct boxes in a 1U 19-inch rack mount chassis.

Inputs and outputs of each of the four channels are isolated to maximize channel separation. Transformer isolation on each output helps to eliminate system ground loops.

It is a rock solid, roadworthy interface for connecting outputs of electronic musical instruments (or other audio sources) to the balanced inputs of mixer consoles and other balanced audio products. The PDB4 also allows connection of a music source to an instrument amplifier while simultaneously patching it to a mixer.

Key Features

  • Four Fully Isolated Channels
  • Switchable Input Attenuation
    (0dB, -20dB , -40dB)
  • 50k ohm Instrument/Line Input
  • 50k ohm Parallel Link Jack
  • 600 ohm XLR Output Jack
  • Switchable Ground Lift
  • 1U 19-inch Chassis


Frequency Response 10 Hz – 50 kHz +/- 0.5dB @ +4dBu
Input Connections ¼-inch TS unbalanced
Output Connections XLR male balanced
Input Impedance 50k Ω
Output Impedance 600 Ω
Ground Lift Switchable
Input Attenuation Switchable (0dB, -20dB, -40dB)
Chassis Type All steel black finish
Power Requirements None Totally Passive
Dimensions 1.75″ x 19″ x 6″ (44.5mm x 483mm x 152mm)
Weight 6.5 lbs. (2.95 kg)


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