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Originally Posted by chitowndad
Wow, now I'm more confused... Jack - what do you recommend that I do next??
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You want the absolute phase of the new speakers to be the same as the old speakers... in other words, when the old speaker cone moved out, you want the new ones to move out as well.
Take a 9V battery, and touch it momentarily across the old speaker terminals. When you do this, observe which way the speaker cone moves... in or out.
Then do the same to the new speakers. Making note of which terminal (+ or -) you touched to the large lug on the old speaker compared to the new one, you'll now know which lug on the old one, and which color wire, is the same as the positive terminal on your new speaker.
If plus to the large lug on the old speaker makes the cone move out, and plus to the plus terminal makes the new speaker cone move out, then the large lug and wire should be hooked to the plus terminal on the new speaker. Make sense?
Be careful to only *briefly* touch the battery to the speaker terminal. While 9V isn't much power to a speaker, a speaker is designed to handle AC current. A battery is DC, and DC will kill a speaker. A quick touch (1/2 a second) will show you the movement, and won't hurt anything. If you're worried, start with a single C or D cell. They are only 1-1/2 volts, but may not give you enough movement to see.
As someone pointed out, even if you end up getting them backwards, you may not be able to hear the difference in a roadster anyway. Wire them both the same, and enjoy! It won't hurt anything if you get them wrong, except the sound if you're a critical listener.