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Thread: JBL L-300 Summit woofer re-foam problem

  1. #16
    Dang. Amateur speakerdave's Avatar
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    That may be the ticket. Good luck with it.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  2. #17
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    Update -Sagging spider fixed, for now....

    Well I'll be darned. It actually appears to have worked. For now, anyway.

    With the speaker upside down and supported on the basket edge so the cone was free to move, I used 4 empty toilet paper rolls squished down between the cone and the frame to get the spider flat. I the hit it with a good hair dryer, for about 15 seconds through each basket hole all the way around. I let it sit for about an hour, and then repeated the heat treatment. I then let it sit over night, and then flipped it over on to the coil end. After letting it sit again overnight, it seems to have stayed flat. I played the 30 Hz tone thru it at around 100 W, and it's working fine, with no clicking or slapping. I have no idea whether it will last or not, but for now you guys have saved me a ton of time and money. Thank you VERY much!

    Now on to stretching new grill cloth!

    Many regards,
    Keen

  3. #18
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    Great Thread !

    Great Save !

    Fwiw, I generally miss a lot of what goes on here at LHF during the summer .

    So many thanks to Dave for posting the reference to SubWoofs ( Mikes ) thread on how to attempt a rehab on a "bagged" spider ( hadn't seen that before ) .


    cheers

  4. #19
    Dang. Amateur speakerdave's Avatar
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    Quote Originally Posted by keenyoung View Post
    Well I'll be darned. It actually appears to have worked . . . .
    Good show.
    "Audio is filled with dangerous amateurs." --- Tim de Paravicini

  5. #20
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    One last problem - what kind of glue?

    The new grill cloth was a challenge because of the depth of the L-300 grill frames, but they came out great.

    However, my last task to finish the speakers was to glue the gaskets back onto the baskets. I did one, and ran out of glue. Anyone know what type of glue is used on a foam re-surround? I don't want to by another surround kit.

    Thanks again,
    Keen

  6. #21
    Senior Member SEAWOLF97's Avatar
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    Quote Originally Posted by keenyoung View Post
    The new grill cloth was a challenge because of the depth of the L-300 grill frames, but they came out great.

    However, my last task to finish the speakers was to glue the gaskets back onto the baskets. I did one, and ran out of glue. Anyone know what type of glue is used on a foam re-surround? I don't want to by another surround kit.

    Thanks again,
    Keen
    I would just use Elmers white
    It's easier to try , than to prove it can't be done ...

  7. #22
    Senior Member BMWCCA's Avatar
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    Elmer's would certainly work but Aleen's Tacky Glue from any fabric store or Walmart seems to work better in nearly every application.
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

  8. #23
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    Quote Originally Posted by BMWCCA View Post
    Elmer's would certainly work but Aleen's Tacky Glue from any fabric store or Walmart seems to work better in nearly every application.
    Agreed, it's much higher quality, and still inexpensive.

  9. #24
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    Re-foam glue

    Thanks for the tips. I found a local speaker repair place (Midwest Speaker Repair, MN) that will sell me an ounce of the original white Bostik cheap.

    Many regards,
    Keen

  10. #25
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    Final result of refoam - regrill - reglass - touchup of JBL L-300 speakers

    Hi all,

    I thought you might like to see the end result of all your help to me on these L-300s. They sound fantastic, and look pretty good too.

    Thanks to all,
    Keen
    Attached Images Attached Images    

  11. #26
    Senior Member Krunchy's Avatar
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    They look Great Hope you got lots of music and even if you do get more, you can never have enough.

    Enjoy!

    What gear are you using to powe the beasts?
    Just play music!

  12. #27
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    Heathkit AP-1800 Preamp
    Pair of Adcom GFA-555 amps
    Pair of Heathkit AD-1304 audio processors
    Pair of SoundCraftsmen equalizers
    Bob Carver Sunfire subwoofer
    Dual 721 turntable with Ortofon amped stylus
    Teac Tascam 122 cassette deck
    Sony MDX-D5c CD player
    Crappy Harmon Kardon tuner
    Klipsch Chorus speakers for the front channels

    Some of the bits including the speakers I got from my father's estate, some I've accumulated myself over the years.

    Keen


    Quote Originally Posted by Krunchy View Post
    They look Great Hope you got lots of music and even if you do get more, you can never have enough.

    Enjoy!

    What gear are you using to powe the beasts?

  13. #28
    Senior Member Krunchy's Avatar
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    Hi Keen, Looks like you're set in all departments, now just sit back and Listen! & Let us know your impressions.
    Just play music!

  14. #29
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    Keen, great job on the resurround, spider rejuvenation, and the grille / cabinet work. I'm sure your father would be proud.
    When faced with another JBL find, Good mech986 says , JBL Fan mech986 says

  15. #30
    Senior Member BMWCCA's Avatar
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    Check the date on this thread.

    The OP sold his family heirlooms right after posting here and hasn't been around since. That was over eight-months ago.
    ". . . as you have no doubt noticed, no one told the 4345 that it can't work correctly so it does anyway."—Greg Timbers

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