Pro-DI Single Channel unit

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.

Precision engineered Most of the Audibox range share a common footprint and manufacturing platform. Offset lid screws enable close side-by-side mounting of multiple units.Click on image at Right to see larger version

 Available in Single Channel or Double Header format

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

Construction
All-steel powdercoated chassis, fibreglass PCB