my gf just got a 2001 mustang with mach 460 speakers the rear speakers are not plugged in what so ever there is no bass, could anyone post some pictures of what the rear wiring and if it needs a amp or what not looks like pls trying to findout what we are missing thx !

 

I had thus same issue. I just ended up plugging them into an amp. The sound wasn't too much better, but sounds better than just the tweeters lol.