[19caprice91]

Hi! I have a 1991 Caprice Classic with the BOSE Delco Silver series radio/cassette player. Whenever I turn my radio on, I get a high pitched noise from the speakers. :frown2: It does not fluctuate with the engine noise, and, from what little research I have done, it seems that the capacitor inside the stock amp may be fried? Or worn out from age? If someone could confirm this, I would appreciate it, as well as if anyone knows how I can fix it, or of a place that could fix it for me? Thanks in advance! :grin2:

 

[91ss]

Worth a try. Probably an electrolytic as they leak over time. Should be easy to spot. Mine crapped out and is sitting on a shelf. Forget if it was the same issue.

Swapped in a Jensen amp, but it never worked right. Couldn't get rid of the whine. Best thing I did was to eliminate it all together and just install a later model factory CD player plus added tweeters in the dash pad. Sounds way better than the bose ever did.

 

[96 Black]

...a high pitched noise from the speakers. ...It does not fluctuate with the engine noise, and, from what little research I have done, ...

Any reply from me more than 5 words is at risk of exceeding my knowledge of stereos, - but big culprits for whines (and pops) for me have always been lost grounds, ground loops and impedance mismatch.

 

[19caprice91]

Do you know if the ground would be a constant whine or sporadic? and i think i may have even less knowledge than you about stereos... what is "impedance mismatch"?

... big culprits for whines (and pops) for me have always been lost grounds, ground loops and impedance mismatch.

 

[19caprice91]

I will have to pull it and check it out. I'm going to put a new antenna motor in it here soon since the antenna won't go up and down and I was able to figure out that specific issue. I will let you know what I find. Thanks!

-Chris

Worth a try. Probably an electrolytic as they leak over time. Should be easy to spot. Mine crapped out and is sitting on a shelf. Forget if it was the same issue.

Swapped in a Jensen amp, but it never worked right. Couldn't get rid of the whine. Best thing I did was to eliminate it all together and just install a later model factory CD player plus added tweeters in the dash pad. Sounds way better than the bose ever did.

 

[91ss]

Gave up on my antenna, fix twiced. Now it's just in the up position.

Looks like we have identical cars from the pic lol. Before I added the wheels. Mine to came from a grandpa. I was surprised at all the options he had. Curious, does yours by any chance have the bigger 8.5 inch rear with a 3.08 posi? Yet only have the FE1 suspension.

 

[19caprice91]

Umm... how would I figure that out? I really haven't done much looking into specs on the car other than if a problem occurs, I focus on that area...

... Curious, does yours by any chance have the bigger 8.5 inch rear with a 3.08 posi? Yet only have the FE1 suspension.

 

[91ss]

All the options will be on the label on the trunk lid. A posi would have a G80 in the list. Same for the suspension, you'd see an FE something.