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BeoLab 8000: which damping foam material to use for replacement?

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KolfMAKER
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Many B&O BeoLab 8000 owners are aware that the early 8000 models have damping foam that perishes, falls apart and gets sticky to the PCB and components.

I have such a pair now and want to clean all the foam dirt out and replace it with proper material. So I can use some suggestions:

  1. What is the foam material that B&O started using (the white damping foam) to replace the old bad foam (dark grey)?
  2. Is there any alternative, with good availability, that's recommended?

 

See picture of the new foam (white) attached.

Hope to hear your advice! 


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KolfMAKER
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You are welcome.

This problem does not belong to all BeoLabs 8000. B&O at some point changed the foam material they used. It is easy to recognize, as the good foam material is white and the old is dark brown. From experience I would say that a majority of BeoLab 8000 in 2nd hand oferings have the old foam. It might be that all Mark I have the old foam and Mark II has the new. But I am not sure.

The new type of foam can be ordered with B&O dealers. Sometimes you can find it on eBay. Though most offerings on eBay are $50 or more (excl. shipping) for only one set. I have bought with B&O dealers 2 sets for just €25. I think the article number is 3332084 00000001.

There is a gasket between the edges of the aluminum speaker casing, and the speaker panel unit and power supply/amplifier unit. This is thin and narrow double sided tape. Easy to find on aliexpress or banggood.

Yes, traces can be restored by soldering wires connecting the points of the original trace.

Beozip
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Beozip replied on Sat, Aug 14 2021 9:31 AM

smuehli:

Thank you for this description. 

Does this problem belong to any BL8000? I own the Mk 1.5 as I remember  (1995 or 1996) . . . .

Where can I order the new foam?

Are there any gaskets between the panels and the housing?

The trace(s) could be restored by soldering over the wholes, or not?

 

You can order from this Ebayseller in Germany/Berlin.

Make an priceoffer for the best price. I got a big discount Big Smile

 

https://www.ebay.de/itm/154203121912

 

good luck Smile

gerard
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gerard replied on Mon, Aug 16 2021 10:50 PM
KolfMAKER:

There is a gasket between the edges of the aluminum speaker casing, and the speaker panel unit and power supply/amplifier unit. This is thin and narrow double sided tape. Easy to find on aliexpress or banggood.

Hi @KolfMAKER,

I have this EVA sponge foam tape. 1mm thick.

amazon: https://www.amazon.de/Dichtungsband-Selbstklebendes-Schaumstoffband-Türdichtung-Schalldämmung/dp/B08P1R85GH/ref=mp_s_a_1_1?dchild=1&keywords=Dichtungsband+für+Türen+Fenster+2+Rollen+10m+x+15mm%28B%29+x1mm%28D%29+Selbstklebendes+Schaumstoffband+Türdichtung+Fenster+Schaumstoff+Klebeband+für+Kollision+Siegel+Schalldämmung&qid=1629150061&sr=8-1

Do you think this will do the job as gasket?
KolfMAKER
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@Gerard

The type of tape you refer to is fine.
The thickness of this tape is 1mm, which is thicker than the original tape used by B&O.

My suggestion would be to look for tape which is thinner, to a max. of 0,5mm.

You could use for instance use tape that is also used for repairing smartphones. It has the right material, strength and thickness for the BeoLab. And the thickness will be perfect.

For example: https://nl.aliexpress.com/item/4001247888018.html?spm=a2g0o.productlist.0.0.45e67ef2SuMEWj&algo_pvid=b7f3fce3-39b8-4c02-86c0-37ea26d607c9&algo_exp_id=b7f3fce3-39b8-4c02-86c0-37ea26d607c9-5&pdp_ext_f=%7B%22sku_id%22%3A%2210000015455192446%22%7D

MartD
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MartD replied on Wed, Sep 15 2021 1:06 AM

Last weekend one of my beloved Beolab 8000's failed (red/green light ok, but no sound). Trying to find some clues, I stumbled on this thread and I am very grateful for the clear and knowledgeable info in this topic.

Indeed the failed BL8000 suffered from "foam rot". I removed it and thoroughly cleaned the speaker (what a mess!) and found a trace on PCB01 had been eaten away by the stuff. After soldering in a bridge, the speaker sprung back to life. Hurray!

Next task will be to clean the other BL8000 before it gets affected as well.

Of course I need to put in new foam damping material and I saw that you purchased these from a dealer. As I believe you are also in the Netherlands, could you indicate which dealer you bought it from?

Thanks and keep up the good work!

KolfMAKER
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Dear MartD,

Congratulations, that you have been able to resolve your issue with this information. That's great!
It is definitely a good idea to also treat your other speaker. Better to prevent than to cure.

The new damping foam is a standard B&O article, which you can probably get from any B&O dealer. My suggestion would be to try a local B&O dealer, that might be most convenient for you and saving shipping cost.

If you have trouble finding a dealer with the replacement foam, let me know. 

 

 

MartD
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MartD replied on Fri, Sep 17 2021 1:50 AM

Many thanks for your advice.I have ordered the damping material through a dealer as you suggested.

Once both 8000's are fixed, I will check my pair of Beolab 6000's. According to the dealer, these seem to often suffer from damage to the rubber speaker surrounds. There is quite some info available on the web as well as repair kits. To be continued!

KolfMAKER
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You're welcome MartD.

Yep, the rubber speaker surroundings of the BeoLab 6000 are almost always up te replacement after so many years. It has to do with the choice of material. I have replaced many in the meantime.

I can recommend the repair kits from AudioFriends (Dutch company). The kit for the BeoLab 6000 you can find here.
An instruction for how to it is here

Good luck!

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