bose stereo diagnosis
Thread Starter
Racer
Joined: Jan 2012
Posts: 275
Likes: 26
From: Austin TX
bose stereo diagnosis
i searched bose and have been reading threads for the past hour and i have a problem thats a little different than the typical poping, whining, no sound issues.
my problem is: sound is crap, absolutely no bass and easily distorted sound with volume but, i have very little room with the volume adjustment. i literally have less than 2mm adjustment on the **** between silence and total distortion. also sometimes i get the whining but sometimes it doesnt do it.
my question is, is this a head unit problem or a speaker/amp problem? or both? im probably going to replace the entire unit but i would like to know my options.
thanks in advance.
my problem is: sound is crap, absolutely no bass and easily distorted sound with volume but, i have very little room with the volume adjustment. i literally have less than 2mm adjustment on the **** between silence and total distortion. also sometimes i get the whining but sometimes it doesnt do it.
my question is, is this a head unit problem or a speaker/amp problem? or both? im probably going to replace the entire unit but i would like to know my options.
thanks in advance.
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
I would call Dr. Don http://www.doctordons.com/ very helpful and can likely give you an accurate answer.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
But be as it may, best luck with the Doctor.
Racer
Joined: Nov 2005
Posts: 310
Likes: 47
Sounds like the CDM has gone bad. I had same problem in my 1990. I could hear something coming from the radio but it was real low volume and poor quality. My 1991 had problems with the Bose amps (one amp hissed and popped) -- CDM was fine. I decided to go aftermarket instead of repairing what was there (aftermarket gave me bluetooth and USB, as well). You mentioned that your CDM was under the dash. That is good. I understand that the later model C4s had the CDM behind the seat and many sustained water damage when the top was off in the rain or the top leaked. I have heard that these water damaged units are unrepairable. If you want to get the CDM fixed on the cheap, you might try this guy in Chesapeake, VA. He charges $98 and guarantees his work. According to his eBay ad, he has repaired 17 of these amps, so he must be somewhat familiar with it. I have not had any experience with this vendor but perhaps another member of this forum has and will share their thoughts.
There is a phone number on the eBay auction site, so you might want to give him a call. Here is the jump to the ebay ad:
http://www.ebay.com/itm/CORVETTE-BOS...item25507b8d05
There is a phone number on the eBay auction site, so you might want to give him a call. Here is the jump to the ebay ad:
http://www.ebay.com/itm/CORVETTE-BOS...item25507b8d05
Thread Starter
Racer
Joined: Jan 2012
Posts: 275
Likes: 26
From: Austin TX
Sounds like the CDM has gone bad. I had same problem in my 1990. I could hear something coming from the radio but it was real low volume and poor quality. My 1991 had problems with the Bose amps (one amp hissed and popped) -- CDM was fine. I decided to go aftermarket instead of repairing what was there (aftermarket gave me bluetooth and USB, as well). You mentioned that your CDM was under the dash. That is good. I understand that the later model C4s had the CDM behind the seat and many sustained water damage when the top was off in the rain or the top leaked. I have heard that these water damaged units are unrepairable. If you want to get the CDM fixed on the cheap, you might try this guy in Chesapeake, VA. He charges $98 and guarantees his work. According to his eBay ad, he has repaired 17 of these amps, so he must be somewhat familiar with it. I have not had any experience with this vendor but perhaps another member of this forum has and will share their thoughts.
There is a phone number on the eBay auction site, so you might want to give him a call. Here is the jump to the ebay ad:
http://www.ebay.com/itm/CORVETTE-BOS...item25507b8d05
There is a phone number on the eBay auction site, so you might want to give him a call. Here is the jump to the ebay ad:
http://www.ebay.com/itm/CORVETTE-BOS...item25507b8d05
if i decide to repair the bose ill cheack that guy out, the doctor wants $150 to repair the module so <$100 sounds pretty good.
thanks for the replies, im still weighing my options but im really leaning toward pulling everything out and putting a regular system in. i like the idea of bluetooth and pandora and it will free up some space to mount a couple of gauges and keep them off my pillar.
Racer
Joined: Nov 2005
Posts: 310
Likes: 47
If you opt to move to an aftermarket radio, check this thread out. If your Bose speakers and amps are usable, you can save the hassle and expense of rewiring your car for all new speakers. And the money you save, you can get a new weatherstrip for your leaky top. Also, if it was the heater core, you would smell the antifreeze. I went through that in my 1991. Not an easy fix.
http://forums.corvetteforum.com/c4-t...post1579859427
http://forums.corvetteforum.com/c4-t...post1579859427
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