B8.5 B&O audio documentation/specifications?

[letterk]

When I bought my '13 S4 I found a blown speaker in the front passenger side. They swapped it out for a new speaker quickly. Pretty easy to diagnose. I'm aware of the complaints on the B&O setup, but think there is still something wrong. For instance, people in the back seat say they don't hear much and everything is coming from the front. I have the fader set to dead center. When I play around with the setting, there is a significantly different sound profile depending on position. For instance, when set to far extreme rear drivers side, the volume is weak and no base. Rear passenger side and the base comes back, but muddy and not nearly as strong as when it's put in the extreme front drivers or passenger. Do I still have something wrong or is this normal?

[Pyromatic177]

Well most of the speakers are up front but that does not sound normal. Obviously we all know this system has no bass but there should be a decent amount of Clear Audio in the rear.

[Drunktank]

I remember reading a thread somewhere (maybe Slacktide's?) which said the fader effects the sub. I find this to be poorly put together system with speakers run in parallel, no or insufficient crossovers, sub affected by fader, etc.

[doug97gxe]

Well... I knew it wouldn't be long before I got the car audio itch. The B&O system just isn't cutting it for me. Good news for people looking to upgrade, I'm likely going to sell all the old B&O speakers. Bad news for me, I think I'm going to be spending some $$.

Anyhow, has anyone tackled this yet? I've compiled a list of the wiring I may possibly need using the B8 A5/S5 B&O diagram.



Connection From Amp - J525
BitOne Input
Speaker
Connector
Pin
Color
Notes


Center Speaker +
CH1 +
R158
T32h
5
Blue/White
Changes to Blue/White at T17c, Pin 15


Center Speaker -
CH1 -
R158
T32h
17
Black/White
Changes to Black/White at T17c, Pin 17


Front Left Tweeter +
Use Combined
R20
T27a
11
Red/Blue
B101, Positive Front Left Speaker (Main Harness), not needed for BitOne


Front Left Tweeter -
Use Combined
R20
T27a
24
Brown/Blue
B102, Negative Front Left Speaker (Main Harness), not needed for BitOne


Front Left Midrange +
Use Combined
R103
T17d
15
Red/Green
B101, Positive Front Left Speaker (Main Harness), not needed for BitOne


Front Left Midrange -
Use Combined
R103
T17d
17
Brown/Green
B102, Negative Front Left Speaker (Main Harness), not needed for BitOne


Front Left Tweeter/Midrange +
CH2 +
R20/R103
T32h
6
Red/Blue
Shared with R20, R103, contains combined signal


Front Left Tweeter/Midrange -
CH2 -
R20/R103
T32h
18
Brown/Blue
Shared with R20, R103, contains combined signal


Front Left Midbass +
CH3 +
R21
T32h
23
Red/Blue
Changes to Red /Blue at T27a, Pin 20 (Main Harness)


Front Left Midbass -
CH3 -
R21
T32h
28
Brown/Blue
Changes to Brown/Blue at T27a, Pin 22 (Main Harness)


Front Right Tweeter +
Use Combined
R22
T27c
11
Blue/White
B103, Positive Front Right Speaker (Main Harness), not needed for BitOne


Front Right Tweeter -
Use Combined
R22
T27c
24
Black/White
B104, Negative Front Right Speaker (Main Harness), not neeeded for BitOne


Front Right Midrange +
Use Combined
R104
T17f
15
Red/White
B103, Positive Front Right Speaker (Main Harness), not needed for BitOne


Front Right Midrange -
Use Combined
R104
T17f
17
Brown/White
B104, Negative Front Right Speaker (Main Harness), not neeeded for BitOne


Front Right Tweeter/Midrange +
CH4 +
R22/R104
T32h
5
Red/Yellow
Shared with R22, R104, contains combined signal


Front Right Tweeter/Midrange -
CH4 -
R22/R104
T32h
19
Brown/Yellow
Shared with R22, R104, contains combined signal


Front Right Midbass +
CH5 +
R23
T32h
10
Red/Yellow
Changes to Red/Blue at T27c, Pin 20 (Main Harness)


Front Right Midbass -
CH5 -
R23
T32h
22
Brown/Yellow
Changes to Brown/Blue at T27c, Pin 22 (Main Harness)


Rear Left Tweeter +
Use Combined
R14
B487
23
Red/Violet
Shared with R159, not needed for BitOne


Rear Left Tweeter -
Use Combined
R14
B486
22
Brown/Violet
Shared with R159, not needed for BitOne


Rear Left Midrange +
x
R105
T32h
8
Red/Gray



Rear Left Midrange -
x
R105
T32h
20
Brown/Gray



Rear Left Midbass +
CH6 +
R159
T32h
3
Red/Violet
Shared with R14, contains full signal


Rear Left Midbass -
CH6 -
R159
T32h
15
Brown/Violet
Shared with R14, contains full signal


Rear Right Tweeter +
Use Combined
R16
B485
21
White/Green
Shared with R160, not needed for BitOne


Rear Right Tweeter -
Use Combined
R16
B484
20
Blue/Green
Shared with R160, not needed for BitOne


Rear Right Midrange +
x
R106
T32h
9
Red/Gray



Rear Right Midrange -
x
R106
T32h
21
Brown/Gray



Rear Right Midbass +
CH7 +
R160
T32h
4
White/Green
Shared with R16, contains full signal


Rear Right Midbass -
CH7 -
R160
T32h
16
Blue/Green
Shared with R16, contains full signal


Subwoofer +
CH8 +
R157
T32h
25
White/Yellow



Subwoofer -
CH8 -
R157
T32h
30
Blue/Yellow




Man does the table function suck! Next time I'm posting a PDF.....

If my theory and wiring chart is correct, you should be able to use this to wire up other processors (MS8) or LOC for your subwoofer, etc. You will want to use the "full" or "combined" signals wherever possible. After looking at the B&O schematic, it looks like there are things like microphone and telephone mute that go through the amp, so it doesn't look like it's a great idea to remove the amp completely in favor of a device like the Mobridge (though straight digital to digital sounds AWESOME!)

I realize I'm not 100% experienced in the Audi realm of car audio yet, so please forgive me if I've made an error above. I won't be able to confirm anything until I actually begin install. However, I hope to be building an awesome SQ install that gets plenty loud.

I will be using the factory locations for most speakers in the car and I will be removing the additional midranges and tweeters in the rear. I will be utilizing the rear midbass locations for some full range 6", removing the stock B&O sub to replace with some sort of sub stage, replacing the front midbasses with 7 or 8" speakers (based on depth), 1" tweets in the sails, 3" midrange on dash, and a 3" midrange in center. As I'm out of speaker outputs for the rear speakers, I might just run them from the factory amp, or run an Audio Authority 3xs to split up the front stage further and give me a couple more outputs for those rears.

Confused yet? [:p]

Stay tuned....The B8 would be the second OEM integrated install I've done, so we'll see where it takes me.

......................

[Lamprey]

Sounds like you might have an issue. But, you may want to check which sound focus "profile" you are set too. There are different setting like: Driver, Front, Rear and All. Each can change the sound pretty dramatically.

[jimrobbington]

Sounds like you might have an issue. But, you may want to check which sound focus "profile" you are set too. There are different setting like: Driver, Front, Rear and All. Each can change the sound pretty dramatically.
Was going to say the same.