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The monitor board controls the communication between the Praesideo system and the speaker or speaker line monitor board. The LBB 4440/00 monitoring control panel can monitor multiple auxiliary monitoring boards (LBB 4441/00 and LBB 4443/00) installed inside the speaker on the line. Combined with these monitoring panels, users can monitor 16, 64, or 80 (maximum) speaker or speaker circuits on a 500w amplifier. Basic function each amplifier channel in the prs-xpxxx power amplifier device can provide internal mechanical and electrical support for the LBB 4440/00 control panel. The communication between the monitor board will hardly affect the speaker circuit and no additional wiring is required. The audio signal on the line will not affect communication. The user can turn off and turn on the monitoring function by configuring the software. The system will continuously monitor and control whether there is a monitoring board. The system can detect and report the speaker fault in 300 seconds, and the circuit fault in 100 seconds. Interconnection 20 pin connector and flat cable certificate and recognized safety in accordance with IEC 60065 / EN 60065 standard immunity in accordance with EN 55103 ? 2 / EN 50130 / EN 50121 ? ? 4 standard cooling conform to EN 55103-1/4 FCC - 47 standard part b 15 emergency conform to EN 60849 / EN/ISO 7240 ? ? 16 16 54 nautical conform to the IEC 60945 standard certification Europe CPR EU_CPR CE conformance to standard declaration CE transportation CE COC CE CertAlarm CE DOP GL Poland CNBOP