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The rear left speaker in my 91 started making a funky whining sound, so I replaced the amp with an older one that I had lying around here from one of my older C4's. It's considerably bigger, so I had to do some jerry-rigging as far as wiring/placement etc.
The whine is gone, but I'm starting to wonder if the bigger size means it's more powerful, and if it is, will it screw up anything concerning the other speakers. I love the way the Bose system sounds, and I want to stay with the OEM system.