The house we bought has an OnQ Interface Hub in teh general vicinity of my receiver that is wired to our wiring closet to drive 4 sets of speakers throughout the house (OnQ wall switches for each set of speakers). Today I have a Sonos Connect feeding the OnQ interface. What I would like to do is have 2 inputs feeding the OnQ, 1 being the Sonos Connect and another being the Marantz receiver I have where I could use 1 set of speakers for surround (I already have R/L/C and subwoofer via regular connections). The connection to the Marantz requires speaker wire. So I could buy a Speaker Wire to RCA male adapter. I could also get a couple of Y cable splitters to get my two inputs down to a single input handle that plugs into the OnQ Hub. Will this work? Do I need a speaker selector/switch to protect my amplifier? Any other issues/concerns I need to consider?