Niles CSF48A CSF48A/48" Active Soundbar System DC Power Supply Mounted Separately Sends Low Voltage DC Power Through Wall To Amplifier Module Allowing For Installation Without The Need For An Electrician. Mounting System Allows For Ideal Placement Of LCR Speakers In Any Existing Stud Configuration Easily Connect Wireless Subwoofer Utilizing Nile SW-T Transmitter And SW-R Wireless Receiver. Simply Connect A Distributed Audio System And It Is Automatically Selected When The TV Is Powered OFF. TV Sound Always Takes Priority When The TV Is Turned ON, Even When The Whole House Audio Is ON, Greatly Simplifying User Operation.