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ARCHIVED FORUM -- April 2007 to March 2012
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This is the first Archived Forum which was active between 17th April 2007 and 1st March February 2012

 

Latest post 07-24-2009 6:10 PM by Søren Hammer. 28 replies.
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  • 12-11-2008 2:54 PM In reply to

    • Medogsfat
    • Top 10 Contributor
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    • Joined on 02-21-2007
    • *Moderator* Leeds, Yorkshire
    • Posts 4,045
    • Founder

    Re: Loudspeaker foam rot - can we make a list of the affected models? (I'll start with the Red Line 60)

    Both the woofers & subwoofers on MS150's can be added.

     

    Chris.

    The use of metaphors should be avoided like the plague. They're like a red rag to a bull to me.

  • 07-08-2009 1:43 PM In reply to

    • mfishmike
    • Not Ranked
    • Joined on 06-14-2008
    • League City, Texas
    • Posts 27
    • Bronze Member

    Re: Loudspeaker foam rot - can we make a list of the affected models? (I'll start with the Red Line 60)

    I came up with a radically new modification last year and now have a wonderful sounding pair of Redline 60s.  Many folks have used my suggestion and love the bass they are now getting and will never have the foam issue again.   I've already posted this in another thread here at the Workbench, but here again is the link: http://www.speakerhobby.com/bangolufsen.htm

     

    http://www.SpeakerHobby.com
  • 07-08-2009 2:18 PM In reply to

    Re: Loudspeaker foam rot - can we make a list of the affected models? (I'll start with the Red Line 60)

    You can also look at the older paper cone speakers, especially those with a latex/paper surround.

    This gives way after many years of use, most folk are surprised to find they can be repaired, but you cannot replace the surround with rubber.

    Reason for this is that these old paper cone speakers work in a slightly differant way, and they need surrounds that allow vibration but not any real degree of movement. The cones have very little travel in them.

    So you are looking at Type K, Type S as these have the larger drivers in them. You may also have some issues with Beovox 4000, Beovox 3000, and also the MKIII Beovox 5000 - the earlier ones should be fine.

    There may be others of the paper cone elements that are affected, but these are the ones I have come across or are the ones that I suspect are most likely to suffer. Part of it may come from folk thinking that such physically large speakers can be driven with a modern amp, but their power rating is very much smaller than modern units - some of them will not cope with 25 Watts - proper Watts and not Japanese ones.

     

  • 07-24-2009 6:10 PM In reply to

    Re: Loudspeaker foam rot - can we make a list of the affected models? (I'll start with the Red Line 60)

    Well, I once had a pair of S45's (1983 production) and it suffered greatly from foam rot 2-3 years after purchase (2005). Shortly after, I had aquired another pair because theese speakers are cheap in Denmark (I assume that a lot were produced).

    Beocenter 9300, Beogam CD50, Beocord 5500, Beomaster 3400, Beomaster 4400, 2 Beogram 4000, Beomaster 8000, 2 beogram 8002, Beovox S-75, Beovox MS150.2, Beovox RL6000, Beovox S-35, Beomaster 6000, 2 Beocord 9000, Beocord 8004, Beocord 5000, Form 1, 2x Beolink 1000, Beo4, MX3500, LS4500. Born 1993.

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