which one is positive and negative

[deniswhite1]

a 12" 1200W Sub was given to me by steelcity_aveoman, its a dual voice coil, so it has 2 sets of terminals.




my problem is that i don't know which terminal is positive and which one is negative?

[aveosummit]

This might help you out:

]If you have a speaker and the terminals are no longer marked, you can do
a simple test to determine which terminal is positive (+) and which is
negative (-). This test is useful for midrange/midbass/subwoofers, but
not for tweeters.

Use a 1.5V battery (AA, C, D) and connect the (+) terminal on the
battery to one terminal of the speaker, and connect the (-) terminal to
the other terminal of the speaker.

If the cone moves OUT, then the battery is connected "properly," i.
e., the (+) terminal of the battery is connected to the (+) terminal of
the speaker, and the (-) terminal of the battery is connected to the
(-) terminal of the speaker.

If, however, the cone moves IN, the battery has been connected
"backwards," i. e., the (+) terminal of the battery is connected to the
(-) terminal of the speaker, and the (-) terminal of the battery is
connected to the (+) terminal of the speaker.

-by Ian D. Bjorhovde (ianbjor@mobileaudio.com) with numerous contributions by others.

[deniswhite1]

thanks, that did the trick

[aveosummit]

glad I could help