Will this sub work for HT use?

Discussion in 'Archived Threads 2001-2004' started by Aaron_Morris, Aug 4, 2002.

  1. Aaron_Morris

    Aaron_Morris Stunt Coordinator

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    Well, I figure it will work as it is not blown or anything. A better question would be, will this be a useful driver, or should I sell it and get something a little better suited? It is a Soundstream SPL Mule. It is a 12" car sub that I got over a year ago and never used. Still just sitting here collecting dust. It has T/S parameters as such: QTS .847, Vas .o934m^3, Fs 26.84, Qms10.6, Qes .920, Xmax.011m, SPL 84.96dB. I know this thing isn't very efficent and as I recall it wasn't reccomended to be put in a ported box as per SS... but that to the wind. Could someone crunch some numbers for me and help me out. I have WinISD and I am not exactly sure what to get from the data.
    Thanks in advance
    Aaron
     
  2. Chris Tsutsui

    Chris Tsutsui Screenwriter

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    I didn't know soundstream made drivers. I do like their amplifiers for car audio though albeit expensive. [​IMG]
    That sensitivity isn't that bad, a tempest is only about 90. I dunno if you'll get much information from just the stats, my guess is it will be loud like a HT driver, but I can't say much about the quality and response curve. (Sorry I didn't plug in the numbers, i'm using WinISD beta and still don't get it all).
     
  3. Well, the QTS is above 0.707 which means that no matter how large of a box you make, you will ALWAYS have a hump.

    you MIGHT be able to get away with the hump in an infinate baffle setup, but that is it. You can always use it in a linkwitz transform.

    If this is for car audio, you might be ok since cabin gain can be a crazy beast.

    Just look at a sim of this in a sealed 100L box with no stuffing, you get a Qtc=1.7!!!!

    ..so...DO NO use this if you want an SQ system.
     
  4. Aaron_Morris

    Aaron_Morris Stunt Coordinator

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    Not for use in a car. Was thinking of using it as an interim HT sub.
     
  5. Patrick Sun

    Patrick Sun Moderator
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    Fs is too high is you really want that down low bass performance required by HT standards (for the rumble).
     
  6. Bill Fagal

    Bill Fagal Stunt Coordinator

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    As others have pointed out, that high Q limits your options to Linkwitz transformed, infinite baffle, and (my favorite) open-baffle.
    Nothing too special about the Fs, Xmax, or efficiency of these drivers, so the trouble involved with options one and two seem even less attractive.
    If I were you, I'd experiment with this as a bass driver in a three-way open baffle. While it won't get very low, the highish Q and Fs will help flatten the open-baffle response. If the Le is high too, that could also work to your advantage in a dipole alignment.
    Go here for info about dipole bass systems. Download the Excell spreadsheet--it's an indespensible tool for modeling your setup.
    Bill
     

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