The panel shall be a preamplifier matrix panel for TOA's VX-3000 System.

By connecting the panel to VX-3000's Voice Evacuation Frame via a network, the number of audio inputs, control inputs, and control outputs can be increased.
It shall be equipped with 8 audio inputs and their corresponding volume controls, 20 control inputs, and 10 control outputs. A single panel shall be connected to a single VX-3000's Voice Evacuation Frame, and a maximum of 40 units can be configured per system. Unicast audio transmission shall be made among the multiple preamplifier matrix panels, enabling broadcast activation and microphone announcement at multiple places.
The audio inputs 1 to 4 shall be transformer-balanced, input signal level selectable (-60 dBV/ -40 dBV/ -20 dBV/ 0 dBV), 600 Ω of input impedance and connectable via removable terminal block. The audio inputs 5 and 6 shall be unbalanced, input signal level fixed (-20 dBV), 10 kΩ of input impedance and connectable via removable terminal block. The audio inputs 7 and 8 shall be unbalanced, input signal level fixed (0 dBV), 10 kΩ of input impedance and connectable via removable terminal block.
The control inputs 1 to 20 shall be no-voltage make contact input, open voltage:30 V DC, short-circuit current: 2 - 10 mA with removable terminal block. The control outputs 1 to 5 shall be relay contact output, withstand voltage: 30 V DC, control current: 1 A with removable terminal block. The control outputs 6 to 10 shall be open collector output, withstand voltage: 30 V DC, control current: 100 mA with removable terminal block.
Power requirements shall be 20 - 33 V DC connected via 2-pin removable terminal block. The unit shall use 1 space unit of a standard EIA component rack space and its dimensions shall be 482 (W) X 44 (H) X 292.4(D) mm (18.98" x 1.73" x 11.51"). Weight shall be 3.2 kg (7.05 lb.) and finished in black pre-coated steel plate front panel, with gray smoke acrylic resin volume control section cover. Manufacturer: TOA Corporation, Model: VX-3000PM