Help troubleshooting B+O stereo

[TheNuke]

I'm hoping someone here can help me in understanding whether my Band & Olufsen stereo is performing appropriately. I recently had the subwoofer replaced and it simply doesn't sound right to me. The bass just sounds "dirty". I'm hesitant to push it beyond 15-18 because of how it sounds. I purchased the car with tinted windows and am aware of the water damage that can sometimes be associated with window tinting and subsequent amp failure, so I brought it up and the dealer tells me the amp is in perfect working order. I don't know how to check that, but I'm open to learning if there is a way.

So, I did the only thing I know to do and that's go into VCDS and put it through a self-test, while I recording the data along the way. If you aren't familiar, the self-test basically moves around from one speaker to the next, playing some white noise and providing the voltage of each speaker. All speakers produce sound (Yay!). The voltage bounces around pretty quickly, like 5-10x per second, so I captured the range in which it moved to see if that tells someone something.

Speaker	Lowest Voltage	Highest Voltage
LF Treble	.6	1.08
LF Mid	.2	.32
LF Bass	.08	.16
RF Treble	.4	1.12
RF Mid	2	.44
RF Bass	.16	.24
LR Treble	.4	.64
LR Mid/Woofer	.12	.2
RR Treble	.2	.4
RR Mid/Woofer	.12	.29
Effects Left	.24	.4
Effects Right	.16	.24
Loudspeaker Center	.32	.56
Tweeter Center	.52	1.04
Bass Loudspeaker	.08	.12

Observations (remember, I'm no stereo guy):
Voltage on the sub is lower than the voltage of any other speaker. It's also relatively stable compared to others.
Some "like" speakers (Effects left & Effects right) have voltages that don't even overlap.

Any audio experts out there that can help me with additional troubleshooting?

[subterFUSE]

I'm hoping someone here can help me in understanding whether my Band & Olufsen stereo is performing appropriately. I recently had the subwoofer replaced and it simply doesn't sound right to me.

What did you replace the subwoofer with? Another OEM B&O subwoofer?

I purchased the car with tinted windows and am aware of the water damage that can sometimes be associated with window tinting and subsequent amp failure

I honestly have no clue what on Earth you are talking about here?

The B&O amplifiers are located in the trunk. How would tinting the windows cause water damage to an amp located in the trunk?

[TheNuke]

Thanks for the reply!

What did you replace the subwoofer with? Another OEM B&O subwoofer?

The dealership replaced the sub with another new B+O sub.

I honestly have no clue what on Earth you are talking about here?

The B&O amplifiers are located in the trunk. How would tinting the windows cause water damage to an amp located in the trunk?

:) When the original sub started acting up I did some research and found that a few people had issues where the tint shop they went to used quite a bit of tint solution/water/whatever when applying the tint film to the inside of the rear window, which drained down into the sub amp location and caused issues. Hopefully that makes a little more sense.

[wwhan]

... When the original sub started acting up I did some research and found that a few people had issues where the tint shop they went to used quite a bit of tint solution/water/whatever when applying the tint film to the inside of the rear window, which drained down into the sub amp location and caused issues. Hopefully that makes a little more sense.

That was common problem causing amplifier failure on the B8 A4/S4 models.

[RAF_S7]

Perhaps the easiest thing would be for another forum member, also with VCDS, to run the same test on their B&O system.

You can then do a comparison of the result.

[Soft]

Just as a sidenote, not to hijack, my amp has gone, well almost.
If I ask the dealer to "reset it", it will work for 2 engine starts, after that I loose the front tweeters, and all bass.
I dont know how to interrogate this with VCDS, does anyone have a clue?, the replacement amp is 4k USD here in Norway, and I cannot find any on ebay.(4G0.035.466)

Kim

[RAF_S7]

Just as a sidenote, not to hijack, my amp has gone, well almost.
If I ask the dealer to "reset it", it will work for 2 engine starts, after that I loose the front tweeters, and all bass.
I dont know how to interrogate this with VCDS, does anyone have a clue?, the replacement amp is 4k USD here in Norway, and I cannot find any on ebay.(4G0.035.466)

Kim

http://www.ebay.co.uk/itm/Audi-S7-A7...IAAOSwu1VW4jSy

Repair in the UK?

http://www.ebay.co.uk/itm/AUDI-BANG-...cAAOSwVcFXPHi4

This one has a slightly different part number, but if you look on Ekta, it's compatible with up to 2014 A7, so may be worth looking at?

http://www.ebay.co.uk/itm/Audi-A6-4G...UAAOSwxCxT8ZVs

[Soft]

http://www.ebay.co.uk/itm/Audi-S7-A7...IAAOSwu1VW4jSy

Repair in the UK?

http://www.ebay.co.uk/itm/AUDI-BANG-...cAAOSwVcFXPHi4

This one has a slightly different part number, but if you look on Ekta, it's compatible with up to 2014 A7, so may be worth looking at?


http://www.ebay.co.uk/itm/Audi-A6-4G...UAAOSwxCxT8ZVs

Thanks for the effort! :-)
But the amp that is struggling is the B&O Ice slave amp like this :
http://www.ebay.com.au/itm/2011-2012...-/201298618046
Non of the ones you link to will work
I'll look into the repair option.

[FourRingThing]

what you are describing sounds like the speaker is out of phase with the others. you may want to look and make sure the + and - are connected properly. I had issues with that whole sub module vibrating, I crammed foam between it and the deck fixed it right up.

[Andrew149]

I have a 2012 A6 with B+O and I honesty feel like it's missing tons of mids it's like nothing is there the car has 98,000 miles and I'm wondering if it's normal for B+O system to not have a whole lot of bass and the deck to be vibrating in the back of the car.

Sent from my Moto X Pure.

[subterFUSE]

what you are describing sounds like the speaker is out of phase with the others. you may want to look and make sure the + and - are connected properly. I had issues with that whole sub module vibrating, I crammed foam between it and the deck fixed it right up.

We should meet up sometime. I've never heard the B&O system in the C7 before and I'm very curious to see how it sounds.

This is what's in my S6 currently.

[FourRingThing]

Sound good I would love to check out your S-6 as well, your stereo looks impressive. I am into audio and home theater as well. Send me a PM and we can meet up, I have not seen your car around town.