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speaker selector

  1. Sima ssw6, Sony Dream System, prewired home

    Home Theater
    We bought a house prewired with speakers. From the living room wall there are 2 bundles of wires that are red, green, black, and white. I'm not sure which is + and which is -? Anyone know what is standard. Hooking that part into the Sima speaker selector will be easy. I'm supposed to hookup...