I have the Bose system in my 99 with the concert radio. Something I noticed last winter has come back now that its getting colder again here in WI has come back. When I start the car and its below 60 or 65 degrees or so, there's a static sound that comes from the speakers, it seems to be coming more from the front passenger speaker, although I'm not sure. After I drive for a good while and the car is fully warmed up, the static seems to lessen and then go away. If I leave the car parked for a long time, when I start it up the static is back. I'm guessing it has something to do with the amp being cold, but wondering if anyone has any ideas, its very annoying.

 

Not any help but my 99.5 when I turn on the rear window defrost I get 99% static from my radio! (radio only cd/mp3 works fine) Would you by chance have ur rear defroster on? I've just settled with my windows are tinted so dark I don't need to see out the rear anyways!

 

Are you saying theres static when your radio is off too, or only when its on? If its only when its on are you sure one of the speakers isnt blown?

 

No, its not affected by the rear defroster and I don't think its a blown speaker because after I drive for a while and the inside of the car heats up, the static goes away and everythings fine. When the radio is off, there's no static. I'm thinking it has something to do with the amp being cold, I had the same problem last winter and spring, then when it got over about 60 degrees, the static went away completely. Now, it starts getting cold again and the static returns.

 

they might be affected by the cold of the interior (crazy as that sounds). most speakers are made to work in average temperatures, so when your car is 25 degrees inside, they don't properly vibrate. In my car, if the tone of the song has an overall higher frequency, my tweeters will have some static.

However, I have not noticed this problem in any car other than the a4. it might be something other than the physical speakers. and, i am no car audio specialist, so everything i said above is an educated guess.

 

so i read this thread and totally had to get in on it.. and i read your first post and it is EXACTLY what happens in my car... 1999 a4 1.8t.. concert radio with bose.. my passenger front door speaker does the static when it is cold.. and it only has to be like you said around 65 and lower and it will do it until my car is all warmed up.. i was actually just getting so sick of it and was gunna get a new speaker from Shokan.. cause the sound system is decent in these cars, nothing spectacular, but with the static is sounds like complete garbage..

 

I posted a thread on a related topic awhile back and this may be related to your problem. The dust caps on our Bose speakers have low quality glue holding them on. When the glew starts to give, the dust cap begins to rattle, making your speaker sound like it is blown. It maybe that when your car is cold on the inside, the glew has hardened, but when it warms up it becomes stickier and attaches itself to the speaker cone enough to not give the static/ rattling sound. You can find my old thread here: https://www.audiforums.com/forum/b5-models-69/anyone-who-thinks-theyve-blown-have-blown-bose-speaker-94428/

 

well see the thing is.. i have the loose dustcap on my rear deck speaker on the pass. side cause it rattles and ive checked it and sure enough it was.. this is a whole nother sound though.. its definatley an electronic related sound.. interferrence of some sort..

 

Ive had that same problem with the passenger door speaker. And I replaced it with a used one with the same problem, I figured it was a coincidence but now Im wondering whether it was the speaker. I ordered a new one from bose (30 bux), so Ill see what happens when I put it in, it might take a while before I get around to it though, a little over a week or so maybe.

 

For anyone who thinks they might have a dust cap issue, but don't (and the sound is not electronic in nature):

I found Munzter's thread and thought my problem might be a loose dust cap. Upon removing the speaker, the dust cap was solid as a rock. So I poked and prodded a little, found by gently pressing down on the cone on one side I got a scratchy rub. Pressing up from underneath no sound at all.

Googled around a bit and found this is called 'voice coil rub' due to heat or some other issue. Recommended repair is to take apart the speaker, shim the coil in place (centered), loosen the 'spider' with some acetone (or nail polish remover) and let sit overnight.

Since I could not find a way to easily take apart the speaker, I just swabbed the spider top with some acetone, pushed the cone in what seemed like the logical direction to get rid of the rub, and then blasted the speaker with a blow dryer to hasten the process.

Pushed the cone again in the same place as before, and the scratchy rub seemed to be gone. Reinstalled, so far so good! If it comes back, I'll just call Bose Automotive and get the cheap (but OEM) replacement.