Does Size Matter?

Discussion in 'Archived Threads 2001-2004' started by Will Pomeroy, Apr 6, 2002.

  1. Will Pomeroy

    Will Pomeroy Stunt Coordinator

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    I'm extreamly close to ordering my parts to make my sub, but there is just one thing that I'm wondering about: On the adire page, it has suggested alignments, like the 25.5L, something, and something else, all with their respective Q values. I was wondering if I were to design my own box, inbetween on of these values, would I be missing out on a lot, or anything at all for that matter? Are those just suggested because of their well known Q values, or is it because of some "harmonic distortion" or somthing that I do not undertstand?
    Thanks very much for your help,
    Will
     
  2. Michael R Price

    Michael R Price Screenwriter

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    Lower Q = bigger box = better sound. And you can pick any Q you want and design your box to fit that volume. There's nothing special about the Adire designs except the boxes are already planned out.
     
  3. Dustin B

    Dustin B Producer

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    Q value of a box depends greatly on the driver used. With one driver a 2ft^3 box might result in a Q less than 0.6 while with a different driver the same box will result in a Q closer to 1.

    If you designed a box with a volume in between the suggested allignments you'll get a Q in between those allignments Q.

    To lower the Q value you make the box bigger, to higher it you make the box smaller.

    Edit:

    Or as Dustin would have wrote if his brain wasn't mush from working on his 424 project due on tues.

    To lower the Q value you make the box bigger, to increase it you make the box smaller. Q values 0.6 or lower are usually considered best (although going below 0.5 isn't optimal either).
     
  4. Patrick Sun

    Patrick Sun Moderator
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    "to higher it"? [​IMG] Sorry, it just struck me funny.
     
  5. Brian Bunge

    Brian Bunge Producer

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    As an example of what Dustin is saying, my dual SV12 sealed enclosures have an internal volume of 3.4ft^3 with about 3 lbs. of stuffing to get a Qtc of .7. If I replace the drivers with the Dayton DVC 12's I then will have a Qtc around .6! So I'm seriously contemplating doing just that.
    Lowering the Qtc seems much more logical to me than "to higher it"!
    Sorry Dustin! [​IMG]
    Pat, how was your softball game?!
    Brian
     
  6. Patrick Sun

    Patrick Sun Moderator
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    In terms of Q, our bats were severely damped (low Q), while the other team's bats were well under-damped (high Q). (i.e. we got clobbered).
     
  7. Brian Bunge

    Brian Bunge Producer

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    But the real question, what was your individual BL value?
    BL=Beer Loading! [​IMG]
     
  8. Patrick Sun

    Patrick Sun Moderator
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    3 for 3, 2 RBI (real beers ingested?)

    (Apologies to Will for sidetracking his thread. Now we return you to the question on everyone's minds: Does size matter).
     
  9. Will Pomeroy

    Will Pomeroy Stunt Coordinator

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