Processing and Control for Professional AV Installations
Legacy Hardware

305 Distribution Amplifier (1×4)

The 305 accepts one balanced input signal and distributes it to four independent outputs. The volume of the input may be controlled via a front panel trimpot, as can the volume of each individual output.


There are two separate AC supplies coming out of the PS-3: 8.5 VAC @ 1A and 34.5 VAC CT @ 250mA. Pinout is as follows: 8.5 VAC on pins 6 and 1, 17 VAC on pins 7 and 3, center tap @ pins 4 and 5 are connected to earth ground. This is when viewed at the end of the PS-3 7-pin DIN plug.

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No, the only option would be to use a 12VDC to 117VAC inverter with the supplied PS-3 inline power supply.