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Thread: 4688 TCB Monster Subwoofer

  1. #1
    RIP 2011 Zilch's Avatar
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    Thumbs up 4688 TCB Monster Subwoofer

    Triple Chamber Bandpass sub uses dual 18" drivers in "Push-push" configuration. Motors in center chamber.

    Drawing shows center (red) and outer (blue) chamber details separately. Bracing comprising center chamber "port tubes" only shown.

    [Oodles more bracing therein. ]

    Tech note here: http://audioheritage.org/vbulletin/s...ead.php?t=6289

    JBL Lit here: http://www.jblpro.com/pub/obsolete/4688.pdf
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  2. #2
    Senior Member JBLnsince1959's Avatar
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    at what power does this achieve "escape velocity" and orbit the earth

  3. #3
    RIP 2011 Zilch's Avatar
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    Never thought of that.

    More down to earth, we're construction contractors.

    It's on the capital equpment list here under "Demolition."

  4. #4
    Member richard c.'s Avatar
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    Yes, looks like a REAL sub...

    Zilch,

    I noticed this awhile back in your photo, and it got me thinking. "I bet I could build one of these IF I had some pictures and the plans for one. And here they are.

    I wish I lived closer to you, so I could take a bunch of pictures, and take all measurements. I would love to build one of these monsters. I think it would be perfect for realistic pipe organ "power".

    I could build this and install a couple of $29.95 "Super Woofers" that I could find in a surplus catalog somewhere, and I would be in heaven.

    AND, than I could tell everybody that it was "genuine" JBL.

    No, really I would like one to lay down and use it for a platform under a big screen TV. Talk about LF effects!

    Richard C.

  5. #5
    Senior Member JBLnsince1959's Avatar
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    Quote Originally Posted by richard c.
    Zilch,


    No, really I would like one to lay down and use it for a platform under a big screen TV. Talk about LF effects!

    Richard C.
    or better yet, make one and put cushions on it and sit on it while watching the movies... girls I think would REALLY like that......

  6. #6
    Member richard c.'s Avatar
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    I forgot one thing...

    Zilch,

    Do you think this would require a medical release form to be signed by everyone in a normal sized room with this? Might reveal some underlying heart problems.

    Richard C.

  7. #7
    RIP 2011 Zilch's Avatar
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    Yes.

    "Informed Consent" forms are a necessity....

    We need info on the 15" and 12" versions, now, models 4685 and 4682, respectively.

    Who's got 'em?

    http://www.jblpro.com/pub/obsolete/4685.pdf

    http://www.jblpro.com/pub/obsolete/4682.pdf

    Consider all of the homeless drivers out there....

  8. #8
    pelly3s
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    Why does someone need that? Oh I know because its really cool

  9. #9
    RIP 2011 Zilch's Avatar
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    Quote Originally Posted by pelly3s
    Why does someone need that?
    Surely you KNOW this ain't about "need."

    [We're doin' RESEARCH here.... ]
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  10. #10
    Senior Member JBLnsince1959's Avatar
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    Quote Originally Posted by Zilch
    Surely you KNOW this ain't about "need."

    [We're doin' RESEARCH here.... ]


    Yes, that's the name of game....

  11. #11
    Regis
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    Gawd, Zilch, I thinketh you've gone over the edge! The graph is nearly jaw-dropping if I read it right. 100+ DB at 30hz!!! Car alarms will be going off for blocks around!

  12. #12
    Senior Member JBLnsince1959's Avatar
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    If I'm reading this correctly, it looks like it reaches 100 at around 13 to 14Hz and from there it's "all up hill"

    Damn Zilch, you better have some protection with those puppies or put them really far away from the listerer.

  13. #13
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    Hey Zilch,

    If we're not living on the edge... we're taking up too much room.

    Cyclotronguy

  14. #14
    RIP 2011 Zilch's Avatar
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    What if I put 2242H's in it...?

  15. #15
    Senior Member JBLnsince1959's Avatar
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    Quote Originally Posted by Zilch
    What if I put 2242H's in it...?
    might as well and get rid of those whimpy speakers you're currently using. Hey, let's get some REAL volumn going here.

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