Who knows how to check speaker wire polarity?

Tom_M wrote:
Audio going to the speakers is an AC voltage so trying to measure DC will not work. The connections are marked plus and minus just for reference for hooking up the speakers. All that matters is that both speakers are hooked up the same. If the speakers are wired incorrectly one speaker will tend to cancel out the other since the sound is out of phase. It's best to sit in a spot that is centered between the speakers.

Interesting because this is what I always "believed" and in fact I used to hook up the speakers and look at them to see if they were moving the same direction. Then I saw the videos of someone using a DC battery to a speaker and getting it to move different directions. Now I just read about "AC with a DC bias" and I think I get it.

Dave