ARX Pro-DI Single or Dual channel compact direct boxes


A flexible, compact Active Direct box, with normal High Impedance input as well as a separate speaker level input for connection to an aux speaker output on the back of instrument amplifiers.
Heavy duty all-steel chassis finished in attractive matt textured polyurethane, with hardwearing epoxy screen printing and slip resistant rubber pad.
Features include –20 dB Pad and Audio Ground Lift switches, plus Phantom or 12V DC power options.
Security features include Kensington®-type computer lock slot and optional bracket kit for under-table mounting.

Single Channel unit

Pro-DI Duo
Dual Channel unit in unique DoubleHeader format

The unique Audibox DoubleHeader format puts one channel on the front of the unit, and a second channel on the rear, givingtwo channels in the space of one! An ultra useful and convenient option.

Requires Phantom or DC power

Max Input Level
+12 dB Phantom powered, +8 dB using 12 VDC Power Supply.

Input Impedance 1 Meg Ohm

Max Output Level (nominal)
+12 dB 10K Ohm load using Phantom power
+11 dB 600 Ohm load using 12 VDC Power Supply

Output Impedance 680 Ohms Balanced

Output Signal to Noise -100 dB unweighted, -104 dB A weighted

Dynamic Range 112 dB 10K Ohm load using 12 VDC Power Supply

Distortion @100 Hz 0.0025%, @1KHz 0.0026%, @10KHz 0.0033%

Frequency Response 20Hz to 20KHz, ± 0.2 dB

Gain through Unit 6dB (Normal input, Pad switch out)

Power Requirements 48V Phantom power on XLR pins 2 and 3; 12-15V DC from external supply

Pad Switch -20 dB attenuation

Speaker Input
-40 dB attenuation, equivalent to 100:1 decrease in input level.
-60 dB attenuation available when Pad switch also enabled

Input Connectors Insulated jacks

Output Connector
3 pin XLR. Wired Pin 1 Ground, Pin 2 + Hot, Pin 3 - Cold. Audio Ground (Pin 1) lift switch fitted

All-steel powdercoated chassis, fibreglass PCB