Cheaking speaker polarity

[Frankie]

Anyone around here familiar with a method involving a 9 volt battery?

I "think" it has something to do with hooking up the + and - of the battery to the corresponding speaker wire.

At this point I’m not sure what to expect if it’s connected correctly or otherwise.

F

[firestorm]

I've heard of that before, but also heard that putting DC current across the voicecoil(s) like that is a bad idea. It *probably* wouldn't hurt anything, but there is a risk. I believe it is most risky with tweeters. The cone of the speaker will move either inward or out, depending on the polarity of the battery. I believe it should push outward, just as it would when generating a pressure wave (sound). It would be a little safer with a 1.5 volt battery (i.e. AA), but the effect would be less.