I need to purchase a speaker selector ASAP. Here is what I want to do.... Outdoor System 2 pairs of Mirage Outdoor speakers -1 pair facing the pool -1 pair facing the patio 1 pair of Polk speakers inside the garage 1 Denon 2 channel amp inside the garage. I would like each pair of Mirage on a volume control -can I use one volume control for 2 pairs? I do not want to put the Polks on a seperate VC. I would just use the main control inside the garage. WHat do I need? More specifically.... Do I need a speaker selector that has a volume control on it? I am assuming I need a speaker selector with impedance matching. The volume control is impedance matching, or at least the Nile ones are. Do I need impedence matching on the VC if only one pair is wired to it? If I dont have VC on the speaker selector does every pair of speakers have to have a seperate VC? Can I use a SS with no VC and use VCs for the 2 pairs outdoors but not the one pair indoors? Does any of this make sense?