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Isobaric Bandpass?

Discussion in 'Subwoofer Box and Custom Fabrication' started by HoppinS10, Sep 23, 2007.

  1. HoppinS10

    HoppinS10 New Member

    I recently bought 2 10" Kicker Comp VX's with dual 4 ohm coils and a 1000 Watt rms amp from a friend of mine. I am in search of getting these subs to play as low as possible. They will be going into a blazer. I do not want a huge box and I have had an isobaric bandpass before and was extremely impressed with its capability of producing low frequencys. I do not care about sound quality. I am really after getting this thing to drop as low as possible. My question is, Is the Isobaric Bandpass the right box for my application? And if it is, how do I go about designing a box with the correct dimensions?
     
    HoppinS10, Sep 23, 2007
    #1
  2. aznboi3644

    aznboi3644 Full Member

    I wouldn't suggest a bandpass box.

    I would suggest a ported box...how low do you want??? 90 percent of all music has no bass below 30Hz unless you want to play 20Hz test tones all day

    Only thing isobaric loading does is halve the box size requirements....with a bandpass box all of the sound comes from the port...with a bandpass box half of the original size with iso loading makes the port have to be REALLY REALLY LONG to achieve the same tuning with the same cross sectional port area making it just taking up more space.
     
    aznboi3644, Sep 23, 2007
    #2
  3. mrmizcue

    mrmizcue Full Member

    sealed box will play the low's better and they are smaller boxes. You just have to put alot of power to them to get the cone to move. but they do play the low's very well. for a vented box...the smaller the box, the longer the port to tune it to 28-32hz
     
    mrmizcue, Sep 23, 2007
    #3
  4. CadillacETC1997

    CadillacETC1997 Well-Known Member

    another vote for sealed
    bandpass and ported will be louder but at higher volumes its not as tight and has a tendency to crap out and it really is noticeable...
    stick to sealed you will be VERY happy later
     
    CadillacETC1997, Sep 24, 2007
    #4
  5. aznboi3644

    aznboi3644 Full Member

    sealed is boring to me
     
    aznboi3644, Sep 24, 2007
    #5
  6. electrolytic

    electrolytic Full Member

    Welcome!

    sealed is tighter bass, better sound quality and ported would hit lower bass and kind of blur the bass notes no?
     
    electrolytic, Sep 24, 2007
    #6
  7. aznboi3644

    aznboi3644 Full Member

    blurr bass notes???

    hell no...not a nicely designed one
     
    aznboi3644, Sep 25, 2007
    #7
  8. mrmizcue

    mrmizcue Full Member

    all boxes have pros and cons. sealed-pro small box,accurate bass notes great for SQ. cons-not very "boomy" need alot of power. ported pros- not much power needed ,loud as hell. cons- larger box needed, not good for SQ. So it is just a matter of what you like. Ill try to get the best of both with a smaller vented box. 2-12's in a 2cf box tuned to 38-40
     
    mrmizcue, Sep 25, 2007
    #8
  9. JDBuilder

    JDBuilder Full Member

    Try this, built from 3/4", and useing .25^3ft for sub and bracing displacement. 12"H x 34"W x 21"D, 3.851^3ft gross vol. Slot port, 10.5" x 3" x 29"Long@30Hz. After all displacement, 3.029^3ft net vol. This enclosure will hit low and will sound very clean doing it. I have built this design for your subs for two other clients and they both love the tight hit and low bass. I hope this will help.
     
    JDBuilder, Sep 25, 2007
    #9
  10. aznboi3644

    aznboi3644 Full Member

    Saying ported boxes aren't good for sound quality is just aiming toward poor quality and poorly designed boxes
     
    aznboi3644, Sep 25, 2007
    #10