B&O Subwoofer Upgrade

19394 Views 20 Replies 12 Participants Last post by 71tinman, 12 d ago

AlfaMale

Discussion Starter · Apr 28, 2013 (Edited)

7

My standard sub unfortunately was sounding raspy and needed replacing so after a bit of research I found that the B&O Subwoofer can simply by swapped in to both replace and upgrade at same time

I also took the opportunity to Dynamat the whole rear shelf to both seal all the air holes but also eliminate any vibrations from the upgraded sub.

For reference the Part number of the B&O Sub is 8T0035412D , note the standard sub code is 8T0035412. Ie the "D" signifies the B&O.

B&O subwoofer

Standard subwoofer

It's a pig of a job as its very confined apologies for the poor pictures but I'm not very good at being a contortionist !

The process is simple, you need to remove the speaker grill covers to access the hidden screws (not forgetting the one underneath in boot).

Next remove C Pillar covers, carefully these are held by push in clips so a little bit of gentle persuasion and you can pull them off.

Rear parcel shelf is also held in by push clips (after you've removed the screws under grills) you need to lift up the edge nearest the seats and then pull the shelf forward towards the front of the car to release the rear clips. Note you can't do this without prior removal of the C Pillar covers.

Subs then easily accessible to remove the remaining screws.

I purchased three packs of Dynamat which was spot on to cover whole shelf. This is the stuff I used...

http://www.ebay.co.uk/itm/DYNAMAT-X...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

Re installation is the reverse of the above !

Re the standard sub verses the B&O sub the latter is noticeably heavier in weight due to more powerful magnet. End result the the bass is noticeably more powerful and deeper.

Nice easy mod that uses the standard set up including amp.

See less See more

Reactions: 2

1 - 20 of 21 Posts

motjoo

· #2 · Apr 28, 2013

I am going to change my sub. In the sportback, the sub is a joke. So I went to my local
audio shop and he came up with a MB Quart QB-410A flat subwoofer with build in amp.
It fits nicely in the boot and won't take up too much space.
The car in the picture seems to be an A3.
No clue how its going to sound, but I will post an update Friday after the install.

See less See more

Hitster

· #3 · Apr 28, 2013

Ive always wondered, why does the sub fire down in to the trunk, would it sound better the other way round using the trunk as a box?

Also how much of an improvement did the Dynamat make? I used it all along the bottom of the rear shelf as it was easily accessible from the trunk and to be honest it made no difference!

AlfaMale

Discussion Starter · #4 · Apr 28, 2013

Hitster said:
Ive always wondered, why does the sub fire down in to the trunk, would it sound better the other way round using the trunk as a box?

Also how much of an improvement did the Dynamat make? I used it all along the bottom of the rear shelf as it was easily accessible from the trunk and to be honest it made no difference!

Don't think it's made a hue difference in fairness as the A5's are pretty well built do not suffer from vibrations really. It has also blocked up a load of holes and gaps in the rear shelf which has made a difference.

It's hard to judge as I've changed both the sub and done Dynamat at same time. But the set up now is a lot better.

Even at high volume there was no vibration from the rear whereas the front was starting to vibrate so I'm sure the Dynamat was doing something

S5mons

· #5 · Apr 29, 2013

Nice write up.

Now the next question is will an aftermarket sub fit in that space (how big??) and will the B&O amp power it?

AlfaMale

Discussion Starter · #6 · Apr 29, 2013

S5mons said:
Nice write up.

Now the next question is will an aftermarket sub fit in that space (how big??) and will the B&O amp power it?

I did a reasonable amount of research on this first and found that most reckon the B&O amp wouldn't be powerful enough to drive a powerful aftermarket sub. A lot of the aftermarket subs are in custom enclosures in one form another.

Me personally I looks the OEM (+) look and to be honest the B&O sub is plenty powerful enough for my tastes. Particularly as my favourite sound track is heard by opening the window

jschrauwen

· #7 · Aug 24, 2015

Is this on a sportback or coupe?

https://snapguide.com/guides/audi-a4a5-bang-olufsen-subwoofer-upgrade/

Reactions: 1

Krzysztof Rusek

· #8 · Oct 20, 2015

Hate to bring up an old thread... Did you need to upgrade the stock amp to upgrade to the B&O sub?

jschrauwen

· #9 · Oct 20, 2015

Krzysztof Rusek said:
Hate to bring up an old thread... Did you need to upgrade the stock amp to upgrade to the B&O sub?

I didn't upgrade my B&O amp. I replaced my B&O sub with a JL10W0-4 simply because I had two new ones never installed laying around and decided to try it.
It made a noticeable difference/improvement over the B&O.

Krzysztof Rusek

· #10 · Oct 26, 2015

The OP had a stock sound system not B&O.. So I'm asking if he had to upgrade his stock amp to power the B&O sound system... I don't have a B&O amp... I understand that the stock sound system and B&O have different amps.

AlfaMale

Discussion Starter · #11 · Oct 26, 2015

Krzysztof Rusek said:
The OP had a stock sound system not B&O.. So I'm asking if he had to upgrade his stock amp to power the B&O sound system... I don't have a B&O amp... I understand that the stock sound system and B&O have different amps.

No the only change was the sub swap over, amp remained the same and there is/was a notable sound improvement with the B&O sub.

A5strian

· #12 · Oct 26, 2015

jschrauwen said:
I didn't upgrade my B&O amp. I replaced my B&O sub with a JL10W0-4 simply because I had two new ones never installed laying around and decided to try it.
It made a noticeable difference/improvement over the B&O.

You Put a 4 Ohm sub on the original amp? I tought, It needs 8 Ohm

JOHN-GEE

· #13 · Jan 23, 2016

I know this is an old thread, but, how do you remove the speaker covers, do you just prize them off using a suitable trim tool, or are there screws under the shelf in the boot?

JG

Jamin_00

· #14 · Jan 23, 2016

I only did mine the other month and can't remember, Im sure they do just pop off. I must have put a write up somewhere when I done mine. I'll see if I did

JOHN-GEE

· #15 · Jan 24, 2016

Cheers, that would be great.
JG

Jamin_00

· #16 · Jan 24, 2016

I didn't but the more I think about it the more certain I am they come off with a trim tool. I remember hitting them down to get them back in place.

JOHN-GEE

· #17 · Jan 25, 2016

Thanks for the info, I'll be removing once it stops raining in Scotland, so that'll be around July, lol.

I had a quick look over the weekend, they do look quite brittle, need to take the softly, softly approach me thinks. I've got the trim tool set, so half way there already.

Cheers
JG

jschrauwen

· #18 · Feb 1, 2016

JOHN-GEE said:
I know this is an old thread, but, how do you remove the speaker covers, do you just prize them off using a suitable trim tool, or are there screws under the shelf in the boot?

JG

Use the snapguide link I posted earlier. Even though it's not specifically for an A5 Coupe, the basics of it still apply.

Reactions: 1

TonyGza

· #19 · Aug 24, 2021

Following, thanks.

nigelbat

· #20 · Aug 24, 2021

This might help

guides.brit.co

How to audi a4/a5 bang & olufsen subwoofer upgrade

Audi A4/A5 Bang & Olufsen Subwoofer Upgrade

guides.brit.co

1 - 20 of 21 Posts