I just installed some 6x9 JBL speakers in my front doors. I also ordered the suggested Metra adapters, 72-6514. Crutchfield also sent me thier recommended adapters for free, 71-050. I noticed the the polarity between the two adapters were reversed. I looked up the schematic that another member posted and found the 72-6514 adapters will fit however are not the correct polarity. Just thought I would let everyone know. The JBL's made quite a difference in the mids and highs. I actually had to cut back on the treble from the stock speaker setting. I have also installed Polk 3.5's in the dash.
Thanks to the member who poster the schematic. It was definitely a help..
Thanks to the member who poster the schematic. It was definitely a help..