With these new plates you can install low voltage cables behind your flat panel TV, your amplifier or other audio/video devices, flush to the wall surface. DataComm Electronics’ Recessed Low Voltage Cable Plates are used to install low voltage cables behind your at panel TV, your amplier or other audio and video devices. ese plates are designed to be used with 1-gang, 2-gang and 3-gang low voltage mounting brackets made by any major maufacturer. The cable plates can be installed upright or upside down.