The OWI AMP-IW4S digital mixer amplifier is a powerful stand alone audio-only communication system that installs into a standard 1-gang electrical box. It is easy to install, easy to use and is ideal for most small room applications with one to four speakers. Full fidelity output of 25 watts per channel makes it suitable for use in AV and Audio-only room/suite applications in Education, Healthcare, Corporate, Retail, Church, Government, Entertainment and Sporting facilities. The AMP-IW4S digital mixer amplifier is compatible with all 4-8 ohm speakers. It may also be used in larger 25V-70V distributed audio systems serving as a 'stand alone' amplifier in a single room where it provides the end-user with convenient control of the multimedia equipment it supports.