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7 years ago
id stay away fro using a 9 volt battery and get a passive polarity detector like a dedicated polarity tester. then you can look at a couple of lights to give you the info and not have to worry about shorting your voice coils with DC current.
For a time, JBL wired their drivers backwards (they were reverse polarity as compared to the norm). But not necessarily their loudspeaker systems.As to complete systems, that's a lot more complicated, owing to the phase response of the system and decisions made by the manufacturer (which might actually have included "which sounds best when playing music?"). Some are + in the woofer, moving to - in the highs. Some are - in the woofer and + in the highs.When combining different models (which is usually a bad idea - oftentimes combining two of the same model is a bad idea), fire them up and listen, then reverse the polarity of one and see if it sounds better or worse. In some cases, it won't sound good either way.
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