If you desire to replace the RCA or LG unit with components like I did, as I mentioned you have to replace the subwoofer with a powered unit because receivers use an RCA cablefor the sub output. I removed my old sub, but placed the new sub in the upper left cabinet in the entertainment center. I wanted access to it because it has controls. Also simplified the wiring because it sits next to my A/V receiver, blu-ray and sat receiver which all fit perfectly in the center cabinet.Love how the RL hasfrosted glass doors on the cabinets so the remoteswork.
Now if I could just figure out how to get the covers off the ceilingspeakers so I can measure them...