[zaphod373]

Hi ,I have read a few posts about identifying positive and negative terminals on a speaker and I think the easiest way is to use a 9 volt battery . quickly touch the speaker terminals ,with the battery noting carefully, whether the speaker pops inward or outward. Popping outward , is when positive battery terminal is on positive speaker terminal. That's all I have to say about that.

 

[krmathis]

Yes, the battery trick is well known.
Even if I usually stick with a 1.5v battery...

 

[no_eye_dear]

Don't use a 9V battery please, respect those drivers and use a 1.5V like the man says......
Even with 1.5V you'll see a very upsetting thump on them.
I've used a watch battery before......

 

[Bjornboy81]

agreed, 9 volts is a bit too much. 1.5V is plenty for this purpose.

 

[Listen2this1]

I always use a 1.5volt it works well. When I worked in industry for a while we had to do some field destroying of woofers and I made a switch that would send 110v to a woofer. Amazingly enough a Boston Acoustics Pro10.5 Woofer lasted about 30 seconds, Most about 5.

Fyi this is not to check polarity, Just a fun fact.

 

[Zorander]

Interesting info! Is there a way to find polarities on headphone drivers?

 

[krmathis]

Quote:

Originally Posted by Zorander /img/forum/go_quote.gif Interesting info! Is there a way to find polarities on headphone drivers?

Same method can be used for dynamic headphone drivers. As long as you get access to the driver, to see or feel it moving. But you might not want to feed it 1.5v...