Speaker Polarity without getting to the speaker?
Ok, so I have a very odd situation... I know how to check what speaker wire goes where, check polarity, etc... I have two speakers that I cannot get too. They are about 30 in a ceiling in the middle of a room and I have no way of getting to the speaker without renting some scaffolding or something like that. Some of the other wires in the house were backwards and I really want to figure out if these two are wired correctly or backwards. Is there any way of figuring this out? Also, they have grills over the speaker, so I can't see the actual speaker at all. I just want to make sure they are hooked up right on the other end and have no way of telling.
I have seen some devices made for cars that you play music thru the speaker and a little box basically listens and tells you if it is in phase or not. Is that my best route or does anyone have any suggestions that might help me out? Any help is greatly appreciated!! I am stuck at this point.