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Description:Features: 1) Cyber-net PA system-node terminal addressable amplifiers (rack mount type) TW-066/068/069/070 2) Preferred device for network broadcasting terminal, accept computer control and can carry out address seeking broadcasting, realize audio signal selecting and power amplifying 3) Addressable amplifier 4) 6-channels input 5) 100V / 70V output 6) Local 3 background music channel selection and 32 level volume control 7) Maximum volume override in case of emergency 8) DC speaker line monitoring 9) Self diagnostics 10) 220V AC/ 24V DC operation System feature: 1) Microcomputer, 5-way broadcasting sound source, 1-way broad paging input, rated voltage and rated resistance output 2) Choose 5-way background music play and set up 32-level electronic volume control; 3) Automatic receive calling or alarm control signal, realize broadcasting talking, voice alarm forcing broadcasting function; 4) Automatic energy saving, it will automatically cut down amplifier power if not receive and broadcast signal, and automatically turn on the amplifier power when receive signal 5) External broadcasting mike and wire input, realize local broadcasting talking and sound source broadcasting; 6) Self-testing, signal receive, transmit, amplify, anti-jamming abilities. Specifications: 1) Model: TW-066, TW-068, TW-069, TW-070 2) Power supply: AC 220V / 50Hz, DC 24V 3) Power consumption: 100W / 220W / 400W / 600W 4) Power output: 60W / 120W / 240W / 350W 5) Output modes: 100V / 70V 6) Frequency response: 15 - 20KHz 7) Channel isolation:> 40db 8) SNR:> 70db 9) Distortion: <0.1% 10) Communication protocol: RS-422 11) Communication terminal: RJ45 12) N.W.: 11kg / 13kg / 21.5kg