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I've researched both the tech forum and the audio forum and couldn't find the exact symptoms I having on my 86 Convertible Bose.
Whenever I start the car I get a steady "crackling" through the speakers.....with or without the volume being up.....until approximately 5 minutes down the road. Then is seems to go away until the next time I start up to go again. It's not very loud, just annoying. My Coupe has had an after market system since the day I bought it....so I'm new to Bose. Being that the car is 20 years old is it just the system "warming up" or something else.
I'd like to keep the stock system but not if this continues....
A couple of questions, does the sound change pitch with the engine? probably not, if this static is only at sart-up or when the car is 'cold' it could be the amp in the speaker box is giving out, I would listen to each speaker and hopefully only one is doing it, and if this is the case it more than likely the amp. E-bay or send thim off to Bose for repair if you want to retain the factory system.