I have a 2003 WRX.
I replaced the Head Unit a year or two ago with a Sony Xplod deck, it has 52W x 4 pre-amp, etc...
I used a Circuit City plug-n-play harness.
I also replaced the front door speakers and rear door speakers with Alpine's (front) and Phillips (rear).
After replacing the head unit and speakers, my stock subwoofer stopped working, so I unplugged it.
The sound is still pretty good with the speakers but I kind of want to use my stock sub still.
Any idea why the stock subwoofer stopped working, does it have anything to do with the plug-n-play harness from Circuit City, or the speaker replacement?
Any info would be greatly appreciated.