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  1. #1
    AR Newbie Registered Member
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    cabinet for 2X 6'5 bass drivers 20Hz-700Hz....

    building a stereo pair speakers ... but i cant get the cabinet that i want for the 2 6'5 inch bass drivers. They just dont sound good in the one i already made. H e L P?

  2. #2
    My custom user title This Guy's Avatar
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    Quote Originally Posted by Lamerick247
    building a stereo pair speakers ... but i cant get the cabinet that i want for the 2 6'5 inch bass drivers. They just dont sound good in the one i already made. H e L P?
    What's wrong with the sound? You could download a bass box program and play around with that to find the proper box volume to get the sound and roll-off that you're looking for. A better place to ask this question would be the partsexpress.com "tech talk" forums. There are a lot of experienced speaker builders there that could give you some great advice as far as speaker building is concerned.

  3. #3
    Forum Regular hermanv's Avatar
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    Quote Originally Posted by Lamerick247
    building a stereo pair speakers ... but i cant get the cabinet that i want for the 2 6'5 inch bass drivers. They just dont sound good in the one i already made. H e L P?
    Any decent bass box program will require you to enter various speaker parameters. The are commonly known as the Theile/Small parameters.

    I'm guessing that you wil need to know at least:

    Fs (speaker self resonance)
    VAS ( speaker compliance vs air)
    Qts (Total "Q" electrical and mechanical)

    There are a number of sites that explain ths in some detail and sites that list the parameters for popular drivers.

    See for example: http://www.the12volt.com/caraudio/thiele.asp

    For some parameters see:
    http://www.thielesmall.com/database.asp

    After that just search for a woofer box design tool (often Excel based).
    Herman;

    My stuff:
    Olive Musica/transport and server
    Mark Levinson No.360S D to A
    Passive pre (homemade; Shallco, Vishay, Cardas wire/connectors)
    Cardas Golden Presence IC
    Pass Labs X250
    Martin Logan ReQuests.

  4. #4
    Crank it up, dude! huh? hydroman's Avatar
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    How hard is it? You should be building a sealed enclosure of ~.5Cubic feet or so.

    Is your first enclosure truly sealed? I got a lot of buzzing unitl i RTV'ed the speaker to the enclosure.

    Put some insulation in the cavity to damp resonances?

    i don;t mean sound snotty - it just is one of the easier projects to do... Not at all like building the correct ported enclosure. Then you have many things you could do wrong!
    H/K AVR635 7.1
    Denon DVD900
    AE AEGIS III Mains
    ION USB Turntable w/ Shure M97XE
    15" Titanic III Sealed Enclosure Sub
    Dayton Rackmount 1000W :O
    Denon Surrounds
    Sony Bravia KDL40S2000

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