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Would 1.5v battery kill a headphone driver testing polarity?

post #1 of 7
4/11/10 at 5:23pm
Thread Starter 
I goofed up and forgot to mark the cable before cutting them and need to test for + and -. Will the battery test kill the drivers?
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post #2 of 7
4/11/10 at 5:30pm
Since the headphone is basically a coil it doesn't have any effect during polarity change. The only thing you should look for is that usually the signal (+) is in the inside shielded by the ground (-). I hope I could help
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post #3 of 7
4/11/10 at 10:58pm
but are you not heating up the drivers by applying DC across it?
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post #4 of 7
4/11/10 at 11:42pm
people do this with a 9v all the time for speakers. In that case, and in this case, this is a bad idea.
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post #5 of 7
4/12/10 at 12:54am
Just solder on the plug and plug it into a source then test the wires in pairs until you get one setup that sounds correct.
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post #6 of 7
4/12/10 at 1:16am
Never put a DC bias on headphones you want to keep.
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post #7 of 7
4/12/10 at 11:14am
Grado recommends no more than 100 mA of DC. A 1.5V battery will only send 46 mA of DC. Higher ohm headphones will consume even less DC. I think the risk is low if you only leave it hooked up a few seconds.

You will never determine correct polarity by listening, on headphones the difference is very minor if at all existant.
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