Help! Old speakers--polarity not marked

[E T Frog]

I have a pair of old Fisher speakers I want to use, but the polarity is not marked. One terminal is marked GROUND/COM. Is that the positive or negative terminal? Thanks very much.

[pelly3s]

the other terminal would be positive

[calegrant]

Ground=negative=black

[bfalls]

As long as the cabling was identical on each speaker you should be OK. Another way to check polarity would be to use a AA battery. With cables connected touch each of the conductors to each end of the battery. If the cone moves out, the conductor touching the positive end of the battery is positive.