Hello - any insight you can provide on my setup would be most appreciated. \nI moved into a home with a a whole-house speaker system and am not sure what type of amplifier I need to use it.\n\nThe old homeowners left a Sima SSW-4HP, but I think this is just a speaker selector, it's not clear to me whether this will sufficiently power all the speakers and what form of audio I can input to it.\n\nThere are four two-wire speaker cables that come out of the wall, and I was able to determine the following:\n-Cable 1: controls 1 speaker, measures 6.6ohm\n-Cable 2: controls 3 speakers, measures 2.2ohm\n-Cable 3: controls 3 speakers, measures 2.5ohm\n-Cable 4: does not appear to control anything, measures around 0ohm\n\nWhat specs do I need to look for in choosing an amplifier? \nWhat amplifier would you recommend?\n\nI do not plan on using it a lot so don't need a top-of-the-line system. \nI would like to play music over it via my laptop, I guess by using the laptop's headphone jack as an audio-out port that inputs to the amplifier? \n\nThank you for your time.