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Reload Thread: Box build for my Lms Ultra 18"

  1. #16
    power-fanatic07's Avatar
    power-fanatic07 is offline Knockin Doors Down

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    Re: Box build for my Lms Ultra 18"

    Quote Originally Posted by mazdakid View Post
    you need to subtract probably about .25 for sub displacement
    ahh yeah forgot that lol, changed tuning to 30.8
    Quote Originally Posted by ciaonzo View Post
    But I don't have any sweet custom 5400 12's!

    Or an ULTRA, for that matter.
    lol No, that's Chris. I certainly have more than I need, but I'm slowly working on downsizing. I need the closet space back. It's hard to part with them for some reason.

    I'm sure that would sound just fine, hard to tell without an actual model of it. That doesn't tell me anything about FR or mechanical/thermal performance. Myself, if I owned that driver and I were to use it in a vehicle, I would go large sealed. Especially if I had 4K at my disposal. We all like different things though.
    What would be the advantages of using it in large sealed vs ported and tuned low ?



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    Go2Sleep's Avatar
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    Re: Box build for my Lms Ultra 18"

    I know ciaonzo will break it down but in simple terms
    with sufficient power Large sealed = increase in cone control, excursion, frequency range (bandwidth) and power handling

    if i'm not mistaken

    p.s. @OP what program are you using there???



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  3. #18
    mazdakid's Avatar
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    Re: Box build for my Lms Ultra 18"

    Thats exposports box calculator



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