Determining Speaker Polarity: (finding the positive terminal)
Just bought a new pair of speakers but the terminals are not marked positive or negative, how do I figure out which terminal is which??
Well, there are two tech guys how to methods!!
Most Speaker terminals will have one terminal smaller than the other. The smaller terminal is most often the negative terminal (as seen below). If you are still hesitant and MUST be sure, consult method #2.
To be absolutely sure of which terminal is positive and which is negative, we will use a 1.5 v battery to have the speaker react as though it is playing music.
* Special note * do not use any more than 1.5 v as it may damage the speaker coil
As we know, batteries are marked positive, negative, or both ... we will use this to our advantage when hooking up the battery to our speaker.