This is the wiring harness from behind the head unit. Hopefully someone can deduce from this whether I have an amplified subwoofer or whether the Crutchfield wiring harness will fit or not... I'm getting a bit confused. There is a box under the passenger front seat, if that helps the diag. IMG_1201....

I have a 2006 Pontiac Vibe, with the 6CD changer factory radio and it seems 7 speakers (4 in the doors, 2 tweeters in the front doors high, and a subwoofer in the trunk on the right side panel). Not sure if that qualifies as "premium sound" or "monsoon"... Feel free to set me str...