Hello everyone. I need some advice before I end up wasting too much money. I hope someone can help me figure out the right order now for troubleshooting the problems the Bose audio in my A4 Avant is having.
I bought the car a month ago. I'm not sure how long the audio has been bad on it. Here are the symptoms:
The bad:
- The front left and right channels are both full of static and have very little middle or bass.
- The static is cutting in and out on at least the left channel, maybe both. It's hard to tell.
- The rear right channel speaker has good sound, but it has nasty distortion at moderate/high volume.
The good:
- The rear left channel speaker sounds really with no distortion. I keep it faded entirely to that one speaker right now.
- At low volume, the right rear channel speaker sounds good. The nasty distortion doesn't start until mid to high volume.
- The subwoofer enclosed in the Bose box in the side wall of the cargo area (it's an avant wagon) sounds great. It has no distortion.
- The dust cap on the front right speaker that I inspected is fine. There is no problem with the glue on the speakers I've looked at. They are in good physical shape.
What I've tried:
-I pulled out the rear right speaker and inspected it. It looked a little distorted so I tested its movement by hand. It has scratching from the coil and seems blown. I think the channel is OK and that replacing the speaker will make it sound good like the left rear.
-I pulled out the front right woofer and inspected it. It looks fine and moves without noise. I can't really tell anything with the tweeter in that door. It looks like a tweeter.
I also tried:
I decided that the front channels on the amp were probably dead because the speakers looked ok but there was so much static and because the channels are kinda cutting in and out. I ordered a used Bose factory avant amp from eBay. I swapped it with the factory Bose avant amp in my car but it actually sounds a little worse in the front. :( So I don't think it is the amp unless both amps are bad (which could be true). I don't know how to test that.
I'm wondering now if the head unit that is bad causing the static up front. Or the wiring but that seems really unlikely. The speakers up front could also be totally blown even though they look OK. They could just be blown differently from the back one that I was able to hear when I moved it by hand.
So, I'd love some advice about what to try next. What do you think?
I was thinking that I should try moving the good speaker to the other 3 channels to see if those channels sound good on it. That would tell me a lot. The downside is that every time I pull off the door cards those old clips and wires get more messed up. I don't want to create a hundred rattles.
? Thanks!
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