I have a 1999 Jeep Grand Cherokee and have had a few problems with my speakers in the last few months. Until now everything in my car has been stock. The spekers and Amp are all Infinity Gold series. recently the speaker in my Driver side rear door started to rattle, then stopped working. However, sometimes if a door is closed hard while operating the speaker comes back on. Recently my Passenger side tweeter has started ratling. No stoppage yet, but it rattles enough for me to not play music loud at all. Do these sound blown, or just malfunctioning wiring? Also, I am planning on getting 2 subwoofers very soon. It looks like i will be getting 2 JL 12W3s. My friend and I will be building the correct box for these, but i am wondering what amps you experts can recommend? Any thoughts on other subs, i am definetly not set on these, but the price range is very appropriate.