I just built a new house and had the family room pre-wired for 5.1 surround sound. For my sub-woofer transmission they used coax from the receiver location, through the walls terminating at the sub-woofer location. Both the receiver and the sub-woofer use RCA connections. Also, I have to connect the other speakers in the same wall plate therefore I require the use of a wall plate that can accept inserts i.e. phone, cable, speaker wire terminals, etc. Does anyone know of someone that makes an insert that is RCA female on the outer side and can accept a coax signal on the back side? I have checked Leviton's web site and have not been able to find an insert like this.
We carry several brands including Russound. Any moderately competant dealer should have them. If not, drop us a line at firstname.lastname@example.org. Good luck!