Matt, suggest you make contact with Dr. Don
http://www.doctordons.com/ He worked for Bose for many years and set up a repair shop in Texas when he retired from them. Great guy who gives you the right information. When I purchased my car the radio just made squeals and pops. It was recommended that I contact Dr. Don and he told me the amps go bad on the OEM models. While I wanted to purchase all new speakers, he said no. Front speakers are made of cloth and will last forever, just needed the front amps. For the rear speakers, he said to purchase the speaker with amps as they are made of paper and the heat over 30+ years wear them out. "While I was at it"...you know how that goes, I also sent him the head unit to replace the first gen laser for the CD to a modern one 100's of times more powerful which stops skips when you hit a bump and on the cassette side he hardwired a 4 foot AUX input cable so you can plug in your phone or XM radio. I have a XM radio hidden in the center console and have a RF repeater in the dash vent next to the shift light. To change channels, just point the remote to the vent and change channels all day long. Best of both worlds, everything looks 100% stock but you have just outstanding sound. People are amazed that this great sound comes out of a 30+ year old system. One of the best mods I have done.