Results 1 to 12 of 12

Thread: Cloth Surround

  1. #1
    Senior Member indycraft's Avatar
    Join Date
    Sep 2005
    Location
    Iowa
    Posts
    162

    Question Cloth Surround

    Hello,

    What is the black substance used to coat the cloth surround and seal the dust cover on a 123A speaker? Is it available from JBL and will they sell it to an individual?

    Thanks,
    Indy

    Is this Iowa?
    No, it's heaven

  2. #2
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,963
    Mastic. I believe GordonW has made some recommendations. Check out his posts using "Advanced Search." Please post the relevant links you find for future reference....

  3. #3
    paragon
    Guest

    Black substance

    Bitumen ???

  4. #4
    Senior Member indycraft's Avatar
    Join Date
    Sep 2005
    Location
    Iowa
    Posts
    162

    Dome Adhesives

    I found information posted by Edgewound regarding dome adhesives.

    http://www.audioheritage.org/vbullet...ead.php?t=7023

    Listed adhesives are: Loctite Black Max, Black bostic, Black CP Moyen.


    Still looking for information on cloth surrounds. Can cloth surrounds be "reconditioned" so to speak? I have seen speakers (usually 4311s) in pictures (ebay) with some sort of goo dripping down the front. Why wouldn't they have placed the cabinet on its' back? (rhetorical question but welcome your responses)

    Thanks
    Indy

    Is this Iowa?
    No it's Heaven

  5. #5
    RIP 2011 Zilch's Avatar
    Join Date
    Jun 2004
    Location
    Berkeley, CA
    Posts
    9,963
    Vertical is the best storage position so that the spiders and cone don't sag under gravity.

    Invert the driver, and the mastic will run the other way.

    Didya know glass is a fluid? Over hundreds of years it will get thicker at the bottom due to gravity.

    [It don't run out over the edge of the frame tho.... ]

  6. #6
    RIP 2009
    Join Date
    Feb 2004
    Location
    Rohnert Park, CA
    Posts
    3,785
    Quote Originally Posted by Zilch
    Didya know glass is a fluid?
    Dang - 'guess I'd better flip the tops on my L65's...

    John

  7. #7
    Senior Member
    Join Date
    Feb 2004
    Location
    Central Coast California
    Posts
    9,042

    Cool liquid glass

    Quote Originally Posted by Zilch
    Vertical is the best storage position so that the spiders and cone don't sag under gravity.

    Invert the driver, and the mastic will run the other way.

    Didya know glass is a fluid? Over hundreds of years it will get thicker at the bottom due to gravity.

    [It don't run out over the edge of the frame tho.... ]
    I can verify this from the windows in an old house I bought in MI some years ago. The house was built in 1880 and had the original windows in the back section. I replaced them of course, but having heard the "glass is liquid" thing before, I took one of the old panes and cut a cross section from top to bottom in three places.

    All five glass slices were thicker near the bottom and thinner at the top, but the distortion was greater in the center, where the top was thinner and the bottom thicker than anywhere else. Also, the sag in the middle was lower than the edge pieces.

    I wondered if left standing for another hundred years if the tops would eventually gap, but I didn't have the time to wait, so I threw them away.
    Out.

  8. #8
    Senior Member JBLnsince1959's Avatar
    Join Date
    Dec 2003
    Location
    KC - land of ahhhhs
    Posts
    1,795
    Quote Originally Posted by Titanium Dome
    but having heard the "glass is liquid" thing before, I took one of the old panes and cut a cross section from top to bottom in three places.

    All five glass slices were thicker near the bottom and thinner at the top
    simply turn them upside down and in another 100 years they'll be perfect again.

  9. #9
    RIP 2010 scott fitlin's Avatar
    Join Date
    Apr 2003
    Location
    Brooklyn NY
    Posts
    4,343
    Quote Originally Posted by JBLnsince1959
    simply turn them upside down and in another 100 years they'll be perfect again.
    Now why didnt i think of this? If I knew i was going to be around in another hundred years......

    Wonder if JBL will still be around?

    scottyj

  10. #10
    Senior Member
    Join Date
    Feb 2004
    Location
    Central Coast California
    Posts
    9,042

    Exclamation CAUTION: Turn for the worse

    Quote Originally Posted by scott fitlin
    Now why didnt i think of this? If I knew i was going to be around in another hundred years......

    Wonder if JBL will still be around?


    Well, the original JBL brand is still around, though I won't link to it for fear of offending anyone (again ). That JBL product line is over 100 years old.

    I wonder if the existence of that JBL is why there's never been a "JBL Cascade" speaker. Ugh! Think about it... Oh, crap, just do a little digging around, and you'll come up with something.
    Last edited by Titanium Dome; 10-05-2005 at 10:33 PM. Reason: to help with the search
    Out.

  11. #11
    Senior Member Don Mascali's Avatar
    Join Date
    Sep 2004
    Location
    Sarasota, Florida
    Posts
    494
    Oh, crap
    4406, 4412A, L100, L100t3 (3 pair), L1, L7, 4645C, 4660A, 4695B, SR4735 and various DIY JBL Pro loaded systems.

  12. #12
    paragon
    Guest

    Used on K145

    I used simply non drying and cheap Bitumen for cars at my K145 surrounds. A very thin layer with a small brush (?) will help. Compliance is a little bit more stiff than original, but this has no effect in the 4530. TSP will off course change (Reflex enclosure !). But you get also a new driver with other TSP when you change the surround or the whole cone.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Zappa in plush surround sound...
    By jblnut in forum General Audio Discussion
    Replies: 15
    Last Post: 08-12-2006, 12:39 AM
  2. Help with L100 cloth grill frames?
    By wpod in forum Lansing Product Technical Help
    Replies: 2
    Last Post: 09-20-2005, 12:20 PM
  3. foam vs cloth
    By 57BELAIRE in forum Lansing Product Technical Help
    Replies: 61
    Last Post: 05-15-2005, 08:26 AM
  4. Grille cloth
    By RickL166 in forum Lansing Product General Information
    Replies: 1
    Last Post: 01-29-2005, 11:23 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •