8' sub woofer wire polarity. (Replaced with Pioneer) - Jeep Wrangler Forum
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Old 12-28-2017, 11:59 PM
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8' sub woofer wire polarity. (Replaced with Pioneer)

I just installed a Pioneer 8" TS-SW2002D2 in the stock box and using the stock amp and wires. I used metra adapters and I want to make sure the polarity is correct.

There is two pairs of wires..From my research , I find that the Grey wires are + and the Green is(-). for both pairs Is this correct ?

I just question this because this makes the white wire in the metra adapters (-) and the black metra wire +.

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Old 12-29-2017, 12:01 AM
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This is concerning a 2014

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Old 12-29-2017, 11:20 AM   #3
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You are correct on the stock sub's wire colors.
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Old 12-29-2017, 12:58 PM
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Ok great! Maybe there is a difference in the metra connectors and/or year differences in plugs, but there are a lot of posts on here implying that if you just plug in the metra connectors , the white will be + and black (-). This was not the case for me.
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Old 12-29-2017, 01:47 PM   #5
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Remember that you are in a jeep. If you were in an acoustically balanced home theater then absolute phase might make a noticeable difference. However, in a jeep, as long as the left/right are in phase with each other, then the absolute phase of the sub vs. the other 4 speakers means very little. If you really want to play, there are swept 20Hz~200Hz .mp3 files out there on the web to test your installation with.
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Old 12-29-2017, 02:26 PM   #6
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Quote:
Originally Posted by bobchase View Post
Remember that you are in a jeep. If you were in an acoustically balanced home theater then absolute phase might make a noticeable difference. However, in a jeep, as long as the left/right are in phase with each other, then the absolute phase of the sub vs. the other 4 speakers means very little.
There will be a readily apparent loss of bass if the sub is out of phase with the other speakers. It's quite noticeable, especially when tested with a monaural source like an AM radio station. An out-of-phase woofer will actually subtract from the available bass.

Flip the subwoofer's wiring back & forth & select the polarity that gives a more centered sound between the speakers and with more apparent bass.
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