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<blockquote data-quote="Deiimos" data-source="post: 8868853" data-attributes="member: 682903"><p>Measuring with the multimeter is just the DC resistance of the voice coil, which registers like a resistor, makes no difference which polarity you connect it and it will not show the polarity of a speaker. I haven't used an analog meter in a while, I do have some and used them for years long ago, but I don't recall them moving backwards during a resistance test of a speaker, would only see negative reading with DC voltage measurements.</p><p></p><p>For the woofers, <u>NOT the tweeters as you can fry the tweeters</u>, again the woofers meaning 6.5" or whatever they are, you can connect a AA battery to its terminals and watch the cone move outward, that is the correct polarity. You tap the wire to the battery and watch the cone move. If the cone moves inward that would be reverse. If they are 2-way OEM speakers you can still do this test as long as they have a capacitor inline with the tweeter as the crossover. Tweeters are easy to smoke with DC voltage.</p><p></p><p>As for the wiring in the doors, I have no clue how you will tell which wire is which polarity other than hooking each side up the same so they are in phase and sound okay. Maybe find a wiring diagram, but probably difficult for modern vehicles and not worth buying any.</p></blockquote><p></p>
[QUOTE="Deiimos, post: 8868853, member: 682903"] Measuring with the multimeter is just the DC resistance of the voice coil, which registers like a resistor, makes no difference which polarity you connect it and it will not show the polarity of a speaker. I haven't used an analog meter in a while, I do have some and used them for years long ago, but I don't recall them moving backwards during a resistance test of a speaker, would only see negative reading with DC voltage measurements. For the woofers, [U]NOT the tweeters as you can fry the tweeters[/U], again the woofers meaning 6.5" or whatever they are, you can connect a AA battery to its terminals and watch the cone move outward, that is the correct polarity. You tap the wire to the battery and watch the cone move. If the cone moves inward that would be reverse. If they are 2-way OEM speakers you can still do this test as long as they have a capacitor inline with the tweeter as the crossover. Tweeters are easy to smoke with DC voltage. As for the wiring in the doors, I have no clue how you will tell which wire is which polarity other than hooking each side up the same so they are in phase and sound okay. Maybe find a wiring diagram, but probably difficult for modern vehicles and not worth buying any. [/QUOTE]
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