this is all excellent info. Is there a formula for figuring out how many watts are actually getting to a pair of speakers? For example, you have an amp which then connects to a 6 way speaker selector, which then connects to 6 pairs of speakers. Let's say you have all 6 on, what would the wattage be? Then let's say you have on 2 on, and so on.. I know you need about 5 watts at least for background music, but I'm not sure how many watts I can get to each set of 6 speakers when using an amp and a speaker selector. I would like to get enough wattage to each of the 6 sets of speakers to really pump, but I don't know if this is possible when using a speaker selector.