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Thread: Box Loudness.... Help?

  1. #1
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    Box Loudness.... Help?

    HarlanC03: from what I'm hearing you've designed a vented box thats just larger?
    HarlanC03: and designed to the specifications of his sub
    Thaiboxing101: sent
    HarlanC03: alright
    Thaiboxing101: he has the cutout dimensions
    BruteFORCE70: ok
    Thaiboxing101: for all the top, bottom, sides and front and port boards
    Thaiboxing101: the box HAS to be constructed the exact way that it's drawn
    Thaiboxing101: everything sandwiches between the top and bottom
    HarlanC03: yeah dude I know how to make a vented box.
    Thaiboxing101: front and back sandwich between the two sides
    HarlanC03: Did you see my earlier questions?
    Thaiboxing101: yes
    HarlanC03: and?
    Thaiboxing101: Thaiboxing101: yes
    HarlanC03: Okay, why do you think this will "quadruple" the sound level of his subs?
    Thaiboxing101: he mentioned he has a sealed system
    HarlanC03: He currently has a vented box.
    HarlanC03: with one central vent
    BruteFORCE70: no
    Thaiboxing101: then it'll be doubled
    HarlanC03: how do you figure?
    Thaiboxing101: with no extra power needed
    Thaiboxing101: does it matter?
    HarlanC03: Well, based on the fact that I think you made that up, yes.
    Thaiboxing101: i don't figure..i know
    HarlanC03: Why not do a vented enclosure
    Thaiboxing101: and BruteFORCE....your friend is a jack ***.........keep or ditch the design..i'll not waste my time anymore
    HarlanC03: errr ported
    Thaiboxing101: bye

    I was just wondering of you guys, my buddy has two JL Audio w3's with a 500/1 amp. They're currently in a vented box with one central vent. This guy claims that seperating them into two seperate boxes with one vent each will double the sound level. I asked why not go ported? he avoided it... but my buddy jsut wants his stereo to be louder. What type of box would you guys recommend?

    Thanks!
    ~H. Charles
    cardomain.com/id/harlanc04

  2. #2
    Variable Bitrate SickVette's Avatar
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    Is your buddies box designed by JL for those subs? If so it is very hard to make the box better. Unless the box is poorly constructed. But assuming the enclosure is properly constructed and it is a JL designed enclosure not likely to get better. Now if the box is not properly constructed build a new one that is. If it is not a JL designed enclosure find out what JL recommends and possibly build another to their specs.

    Or he can add two more woofers or double the power.

  3. #3
    Nic
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    to me vented and ported means the same thing
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  4. #4
    Variable Bitrate SickVette's Avatar
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    Nic.....I missed that. Vented and ported are the same thing.

  5. #5
    FLAC Jahntassa's Avatar
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    It might make a difference, just because each sub is only pushing it's own airspace. So it might make the response a little tighter. Plus it might be more efficient because you'd have two vents instead of one. But I do agree, if they're in a JL box, that'd be as perfect as you get it.

    However, I don't think it will create a 'miraculous' amount of bass.

  6. #6
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    It's a generic vented box, I was under the impression that vented had no sealed anything about it, and that ported had two chambers one side of which was sealed and the other that had the ports about it?
    ~H. Charles
    cardomain.com/id/harlanc04

  7. #7
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    your thinkng of bandpass which is good for spl but is usually bad for sql. It is also difficult to make because everything has to be perfect otherwise it will sound horrible. If your friend is using a generic box he should probably make his own. He will most likely get better results. Generic boxes are not tuned for the sub and they are sometimes made poorly.

  8. #8
    Variable Bitrate SickVette's Avatar
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    lil_ace is correct...it would be best to build a JL designed vented enclosure.

  9. #9
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    Quote Originally Posted by Harlanc03
    It's a generic vented box, I was under the impression that vented had no sealed anything about it, and that ported had two chambers one side of which was sealed and the other that had the ports about it?
    typically, a monobox is a sub box that's one chamber, no matter how many subs are mounted to the box, they are a bit louder, but I don't think it's worth worrying about honnestly....

    you say your friend wants louder....

    sounds like he's got the subs to do what he wants, and possibly the amp.....my next place to look would be power wire....if it's not big enough then he's not getting enough juice to that amp and it's not going to be at the top of it's game....

    you say 2 JL audio W3s.....what 12s?

    in what vehicle? in a suburban or a hatch back?

    if the box isn't to JLs specs I would definately rebuild to their specs, and build the hell outta it....i'm talking at least a single layer of 3/4" MDF, wood glue AND screws/air nails, and silicone all joints once it's all put together....
    Jan Bennett
    FS: VW MKIV Bezel for 8" Lilliput - 95% Finished

    Please post on the forums! Chances are, someone else has or will have the same questions as you!

  10. #10
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    asdf

    His box is in a 92 Caddilac (minds blanking on the model) 4 door with box in trunk. He has two 12" JL W3's and didn't spare any quality/money by getting the bigger amp, what size power wire should he be running? Any bigger than 4 gauge?
    ~H. Charles
    cardomain.com/id/harlanc04

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