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  1. 08-03-2005, 02:12 PM #1
    Zilch
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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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