Edwards EST 3-ZA20B 20 Watt Zoned Amplifier (New)

Edwards EST 3-ZA20B (New)

The EST3 audio amplifiers fully utilize proven digital technology. To deliver highly intelligible voice audio for evacuation and Mass Notification/Emergency Communication (MNEC) purposes.

Digital messages a re generated by the Audio Source Unit (ASU). And live paging messages are multiplexed into eight channels transmitted over fiber optic cable. Or a single twisted pair of wires. Each zoned amplifier contains integrated demultiplexing circuitry. It allows any of the eight digital audio channels to place messages or signals on the amplifier’s built-in speaker circuit.

Audio channel selection is network software controlled, and audio amplifiers are mounted in the same enclosures as other EST3 equipment.

Power for the amplifiers comes from standard system power supplies through the local rail. Field wiring connects to removable terminal blocks on the amplifier module.

Amplifiers support either 25 VRMS or 70 VRMS power-limited speaker circuits. Each 20- or 40-watt amplifier for visual signaling comes standard with one 24 Vdc power limited Notification Appliance Circuit.

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