The EVS-125W is an intelligent 125W amplifier for use with the 5820XLEVS or 6820EVS. The EVS-125W is used to amplify the audio message for distribution throughout the facility. Since it is designed as a self-contained distributed amplifier it can be conveniently located near the area of protection to reduce wiring demands. The Each EVS-125W is capable of producing 125W of audio power. Up to four EVS-125Ws can be used on the voice evacuation system. The EVS-125W has its own power supply with battery backup and four speaker circuits which can be expanded to eight speaker circuits with the optional EVS-CE4. The EVS-125W is fully supervised by the main panel for trouble conditions. The EVS-125W can be surface or flush mounted. It is compatible with the following Honeywell Silent Knight Series FACPs, 6820EVS addressable fire alarm control panel with an emergency voice system, up to 1110 addressable points, and four programmable buttons that can be programmed for routine or complex tasks. 5820XL-EVS, addressable fire alarm control panel with an emergency voice systems and up to 792 addressable points.