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dred

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Posts posted by dred

  9. Bandpass Advice

    in Subwoofers / Enclosures

    Posted

    I am assumeing that for a good bandpass the Thiel specs of the sub should be considered

    qts of the woofer needs to be < 0,3.

    the Q of the enclosure depends on the purpose. 0,7 - 0,9 for general music,

    everything above will result in the 'one-note-wonder' and eventually kill the cone because of to much port gain.

    Hope this ^^ is useful info,

    good luck with the built!

    :drunk:

  14. bandpass box

    in Subwoofers / Enclosures

    Posted · Edited by dred

    you know, that's not a bad idea. have sealed and ported, all in one box. but how would i go about the wiring? like shouldn't i have it push-pull so they don't interfere with eachother?

    Again: Yessir :good:

    I've never built anything like a Bandpass 3 chamber isobaric thingy but

    as long as you half the size of the closed chamber (when going iso) you're fine.

    For instance:

    1 speaker:1 cuft

    2 speakers: 0.5 cuft

    (if you don't it will peak even lower)

    My gf is running a Bandpass 3 chamber in a cabrio

    with good results. So it's a pretty powerful design.

    bpass3cham.gif

    Be sure to tune 5 hz above the frequency you want it to be,

    it peaks lower.

  16. bandpass box

    in Subwoofers / Enclosures

    Posted

    http://www.the12volt.com/12voltimages/bandpass.gif

    so i'm getting one kinda like this but to hold 2. so has anyone had experience with these? and are they kinda easy to build? i'm gonna be putting my 2 HFI12D4s in it. then i'll move up to 4 12's and do a different kinda box. but i just wanted your input on this.

    think.gif

    Mount the 2 HFI12D4's isobaric in the bandpass enclosure and half the size of the sealed chamber ...

    It will play with 'a bit' more authority ... :spiteful:

  19. Twiztid and Tech N9ne

    in Tunez - All things music related

    Posted · Edited by dred

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    type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>">
    name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="
    type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>" type="application/x-shockwave-flash" width="425" height="350">

  23. All Whacked Over T-lines Now !

    in Subwoofers / Enclosures

    Posted

    After reading this again i'll have to refine it a little bit.

    The formula:

    Speed of Sound : Frequency = SonoTube Length, is a full wave length.

    You'll have to divide SonoTube length by 4 for a quarter (and 2 for half)

    All the above is for a straight line enclosure.

    Best thing to do is built a test thingy

    nothing fancy just some crappy old 6 or 8" speaker and a square enclosure,

    mount your 'sub' on a plate that can slide up and down in the enclosure and move it.

    grtz.

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