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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Beolab 8000 mk2 can suffer of foam rot ?

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olvisab
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olvisab Posted: Thu, Oct 13 2016 1:38 PM

Hello,

Have you ever seen a pair of beolab 8000 mk2 from after 2005 suffering of foam rot ?

i have already removed this foam issue from several mk1 and was ready to do it on a mk2 of 2006/2007 and I wonder if it worth to do it. The system on the top of the fret is quite different from the mk1. The top aluminium cap is screwed. 

4 beolab 5,  beolab 9, beolab 10, beolab 5000, beolab 8000 mk2, beolab 6002, beolab 3500, beovision 7 55 mk2,  2 beovision 11 46 mk4, beotime, beosound ouverture, beosound essence, beoplay A8, beomaster 900 RG de luxe and the collection continues...

Hungedu
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Hungedu replied on Fri, Oct 14 2016 5:05 PM

I wasn't aware that BL 8000 speakers were susceptible to this problem. I still have a pair of MK1 8000s from 1993 that still seem alright, other than a bad standby transformer that needed replacement in one of them.

BeoLab 5, BeoVision 7-55 MK2, BeoSound 5 Encore, BeoSound 9000, BeoLab Penta III, BeoLab 8000, BeoLab 6000, BeoLab 2, BeoLab 7-6, BeoSound 8, BeoTime (analog clock), Beo 4 remote.

Jeff
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Jeff replied on Fri, Oct 14 2016 5:11 PM

Hungedu:

I wasn't aware that BL 8000 speakers were susceptible to this problem. I still have a pair of MK1 8000s from 1993 that still seem alright, other than a bad standby transformer that needed replacement in one of them.

I can't tell if he's talking about foam rot on the drivers, which can't happen as the driver surrounds are rubber, or rotting/deterioration of the foam inside the speakers which can damage the power supply board, which I've read about before here.

Jeff

I'm afraid I'm recovering from the BeoVirus. Sad

olvisab
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olvisab replied on Fri, Oct 14 2016 6:11 PM

Foam inside the speakers around the amp and power supply not the foam of the driver.

if you have never remove it from your mk1, you'd better do it. It will attack your pcb.

a b&o tech told me that he removes it each time.

i just wonder if someone saw this issue on a mk2 pair.

4 beolab 5,  beolab 9, beolab 10, beolab 5000, beolab 8000 mk2, beolab 6002, beolab 3500, beovision 7 55 mk2,  2 beovision 11 46 mk4, beotime, beosound ouverture, beosound essence, beoplay A8, beomaster 900 RG de luxe and the collection continues...

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