The single slot 5U cassette is the standard housing for almost all the processing units and amplifiers of the V700 audio module system. The single slot module is 45.7 mm wide, 212.5 mm high and 220 mm deep.
The gold plated, 50-pin connector has a standard connection schema for all the power supply rails, the audio inputs and outputs, and the control ports as well. All units require an audio supply voltage of +/- 25 V for optimum performance but work with slightly reduced headroom with any voltage above +/- 18 V. The difference in headroom between 25 V and 18 V is approx. 3 dB. Internal low drop voltage regulators and filters avoid crosslinking of audio signals across the supply voltages. A separate lamps and relay supply (24 V) separates the audio supply from click noise and disturbances due to switching processes. Microphone amplifiers require an additional 48 V phantom power supply voltage.