DI6SM Architect's Specifications

The signal processor shall be a six channel unit in a steel chassis six inches deep and one rack unit high. The unit shall be capable of operating in four modes: firstly, as Six active Direct boxes, secondly, as a 6:1 Line Mixer, thirdly, as a 1:6 Line Splitter, and fourth, as a 1:6 Microphone Splitter. 

It shall be capable of operating concurrently in the first two modes, and there shall be rear panel switches to facilitate the microphone or line splitter mode. There shall be also be a master level control, which operates in all modes. 

Each channel shall have a High Impedance input and output jack, a level control from oo through to +15dB, and an LED to indicate the onset of circuit overload. Each channel shall have a corresponding electronically balanced XLR output connector, with audio ground lift switch and status LED.

On channels 1 to 6, the Hi Z input connector shall have an Input impedance of 2 Meg Ohms, and the input headroom shall be +21dB. The frequency response (all channels and masters) shall be 20 Hz to 20 KHz, ±0.4dB. The Output impedance shall be 600 ohms balanced, and the maximum Output level shall be +26dB, with a Signal to Noise ratio at unity of -104dB ‘A’ weighted (-98dB unweighted). THD shall be .003% @ 0dB, 1 KHz, and the unit shall have a dynamic range of 107dB.

The Master section shall have an Output Signal/Noise ratio of -96db ‘A’ weighted, with all inputs and master @ unity, an output level of +26dB, and THD of .006% at unity. The master section output connectors shall be both XLR and TRS jack.
 
The Splitter input shall be a balanced XLR connector situated on the rear panel, with a switch to enable this mode and status LEDs on the front panel. The maximum Line level to this input shall be +20dB, with an impedance of 20 KOhms balanced.

The  Microphone level to this input shall be user variable from 20 to 60dB of Gain. In Splitter mode each of the balanced outputs shall be controlled by the front panel level controls.

Power shall be supplied via a removable mains cable, connecting to an IEC connector with an integral fuse and voltage change switch on the unit’s rear panel.

The direct box/mixer/splitter shall be the ARX DI-6SM.