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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 03-11-2009 3:44 PM by BeoMatt. 10 replies.
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  • 03-05-2009 1:11 PM

    • BeoMatt
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    Red Line 45 help urgently needed

    Sad I have just aquired a lovely pair of RL 45's but the foam RECTANGLE surrounds have rotted away leaving displaced rectangle metal plates in each cabinet. Can you get replacement foam ?? And can anyone recommend anywhere, I have found normal speaker ROUND foam but no rectangle replacements, perhaps I should make my own ?? Any suggestions welcome, Matt

  • 03-05-2009 2:01 PM In reply to

    • Puncher
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    Re: Red Line 45 help urgently needed

    Hi Matt,

    This is the same part used in the RL60. It is no longer available from B&O, nor is a repleacement rectangular foam. Member Dillen replaces the foam with a rubber surround, PM him for details if you're interested (note he isn't based in the UK). B&O did at one time supply a bass port conversion plate but there are mixed reports on whether these are still available too.

    I suggest you use the search facility at the top of the page and search the entire site for "RL60 ABR"  - this should pull up most of the threads where this subject has been covered in the past for RL60 repair, it will apply to your case too.

    Have a good read of those and see if your questions are answered there.

    Good luck.

    Generally speaking, you aren't learning much if your lips are moving.

  • 03-05-2009 2:30 PM In reply to

    • BeoMatt
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    Re: Red Line 45 help urgently needed

    Thanks a million Puncher, I will have a look perhaps a diy approach may work ?? Matt

  • 03-05-2009 2:40 PM In reply to

    Re: Red Line 45 help urgently needed

    Beomatt:

    Thanks a million Puncher, I will have a look perhaps a diy approach may work ?? Matt

    Here's one well documented solution, might be helpful!

    -mika

  • 03-05-2009 2:47 PM In reply to

    • Puncher
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    Re: Red Line 45 help urgently needed

    You can always glue a sheet of rubber across the outer metal frame of the ABR and then glue the mass plate to that - the clever bit is getting a rubber sheet with something like the right compliance to achieve the correct resonant frequency for the ABR.

    The tuned port version had the port running parallel to the plate to save space (the speakers aren't that thick). You should find photos of the tuned port conversion plates somewhere among the threads I pointed out - you can maybe estimate the diameter and length of the port from the pictures if you wanted to try that instead of repairing the ABRs.

    Of course just about anything will be better than what you have at the momentLaughing

    Generally speaking, you aren't learning much if your lips are moving.

  • 03-05-2009 2:48 PM In reply to

    • BeoMatt
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    Re: Red Line 45 help urgently needed

    Aha !! I have been looking at the site myself just now, I think I may approach this from a diy replacement angle, the metal plates are in A1 condition, I have no idea of the foam used originally apart from bits in the cabinet, did B&O simply suspend them in a foam membrane ?? Perhaps someone has a good set and can post a photo, I could try and obtain some similar material and reproduce them ?? Thanks again Matt

  • 03-05-2009 2:51 PM In reply to

    • Jandyt
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    Re: Red Line 45 help urgently needed

    Hey Matt.
    If you go down the DIY route, would you be kind enough to take step by step photo's?
    We love a good photo' thread on here!

    Andy T.

    Poor me, never win owt!

  • 03-05-2009 2:52 PM In reply to

    • BeoMatt
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    Re: Red Line 45 help urgently needed

    Big SmileIndeed you are very wise, rubber ? resonance ? hmmm some hunting I think else the port soloution is my only other option, did B&O use speaker cone material or layered foam ?? Matt

  • 03-05-2009 2:54 PM In reply to

    • BeoMatt
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    Re: Red Line 45 help urgently needed

    Yes indeed I will and a trial and I am sure 'error' list of tested materials, Matt

  • 03-05-2009 2:58 PM In reply to

    • BeoMatt
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    Re: Red Line 45 help urgently needed

    'Passive Radiator' every day is a school day I have just been informed this is it's correct term in the speaker world, so i am going to browse boom box sites and get some ideas !!Big Smile Matt

  • 03-11-2009 3:44 PM In reply to

    • BeoMatt
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    Re: Red Line 45 help urgently needed

    I have repaired the 45's and placed pictures and text in the workshop area, under

    'Bang & Olufsen Red Line Authentic DIY ABR (Auxiliary Bass Radiators) Successful Repair'

    thanks to all the advice everyone, Matt

     

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