Pro-DI (Single Channel unit)
Pro-DI Duo (Dual 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.
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
-40 dB attenuation, equivalent to 100:1 decrease in input level.
-60 dB attenuation available when Pad switch also enabled
Input Connectors Insulated jacks
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