Factory Alpine System wired out of phase?

[dayusmc]

I just finished installing DS18 knee panel speakers (Sort of). I noticed DS18 has their speakers wired opposite of the factory wiring diagram and also Stinger and Metra's wiring harness adapter. DS18 has Green as positive. When I tested the speaker, green indeed is positive, even though the wiring diagram has it the other way and also Stinger and Metra's adapters when plugged in are also backwards. I find it odd that the factory wiring diagram, Stringer and Metra got it backwards...
I wonder if all the speakers are backwards.

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[dayusmc]

Correction, Metra 72-6514 are correct, the stinger ones are wrong .
Also the red wolf ones are also correct.
I am guessing Stinger just went off the factory wiring diagram and that apparently is wrong...

 

[NachoJT]

Correction, Metra 72-6514 are correct, the stinger ones are wrong .
Also the red wolf ones are also correct.
I am guessing Stinger just went off the factory wiring diagram and that apparently is wrong...

Incorrect. The red wolf connectors are wired reversed.

 

[jebiruph]

Not Alpine systems, but all the factory speakers in both my base system JL and JT were wired with negative polarity. The Metra adapters maintained the factory polarity. Since I left the factory knee panel speakers in place, I kept negative polarity on the replacement speakers to keep all the speakers in phase.

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