I want to be able to use my Left and Right in-wall speakers in my living room for both my Home Theater system and my whole house audio system. I've seen speaker switches that auto detect which source is powered to send signal to the speakers but they are all part of a specific whole house system (the ones I'm not really considering). I'm leaning toward getting the NUVO Essentia or Concerto and have not seen a auto switch that goes with these models. Is there a generic out there that would work with these or does anyone have any suggestions.