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Which SUB: Tempest or "XXX" (which is better?)

Discussion in 'Archived Threads 2001-2004' started by Chris Carswell, Jun 9, 2002.

  1. Chris Carswell

    Chris Carswell Supporting Actor

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    Ok, I started down the DIY sub road last week. I'm on a $200 budget so it will be tough, but I know you guys can help. I picked up a PE #300-800 150 watt plate amp cheap so now all I need is a sub. Box will be similar to Chris's Frustum Pyramid Tempest: http://www.angelfire.com/sports/RCcars/protosub.html/
    I wanted to go tempest but will got over budget. I started shopping arround for others. I found this one "XXX" brand new that I can get pretty cheap & I have heard good things about it. I am not that good with stats so tell me what you guys think:
    "XXX"
    15" 4 ohm SVC
    $85.00 my cost new (130.00 reg price)
    PARAMETERS
    Fs 31.88
    QMS 4.72
    QES 0.57
    QTS 0.511
    VAS (Liters) 123.79
    REVC (Ohms) 1.8
    SPL @ 1 watt / 1 meter (dB) 90.32
    X-max Linear pk-pk (mm) 24 (so 12mm one way)
    LEVC at 1k Hz (mH) 0.92
    ENCLOSURE VOLUMES - Ported
    Vented (Cu. Ft) 4
    Vented to (Hz) 34
    3dB down point (-3dB Hz) 33
    Port Diameter (") 4
    Port Length (") 12.25
    Number of Ports 2
    ------------------------
    Tempest:
    $150.00
    PARAM VALUE
    Re 3.50 ohms
    Le 2.9 mH
    Qms 6.7
    Mms 195 grams
    Qes 0.40
    Cms 0.34 mm/N
    Qts 0.38
    Rms 3.5 N*s/m
    Fs 18.8 Hz
    Sd 779 cm^2
    Vas 317 liters
    BL 14.2
    Xmax 16.4 mm one way
    EBP 47
    SPL 89.1 dB @ 1W/1m
    No 0.51%
    Pmax 400W per voice coil; 750W total to the driver
    Distortion
     
  2. Pete Mazz

    Pete Mazz Supporting Actor

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    First of all, the XXX driver looks to be set up for car audio use. I don't think your amp will be able to drive a 2 ohm load. That and a high Fs makes for a sub-standard HT driver. [​IMG]
    You won't be dissappointed with the extra outlay of cash for the Tempest. [​IMG]
    Pete
     
  3. Brian Bunge

    Brian Bunge Producer

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    Pete,

    That's a single VC, not dual.

    And I agree. Either get the Tempest or the Parts Express DVC 15" sub. I just finished a DVC 15" subwoofer today for a customer and I am thoroughly impressed! It's 175L tuned to 17.5Hz with the PE 250W plate amp and the 4" flared port. I was hitting 111dB on the "Coming Mother" scene from "The Haunting" from around 6' away and didn't have the sub anywhere near maxed out.

    Brian
     
  4. Pete Mazz

    Pete Mazz Supporting Actor

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    I was looking at RE = 1.8 ohms....

    Pete
     
  5. Chris Carswell

    Chris Carswell Supporting Actor

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    I just checked and it is a 4 ohm DVC woofer. I guess wouldn't be good to power just one of the coils to meet a 4 ohm load. I really should get something that goes lower than 30hz, dauh......
     
  6. Jeff Rosz

    Jeff Rosz Second Unit

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    heya,
    do the dirty deed and go over budget and get the tempest. what else are budgets for? heh, im thinking the tempest will give the XXX a bloody nose in the car app too.
     
  7. JimPeitersen

    JimPeitersen Second Unit

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    How about the Stryke Audio (www.stryke.com) SAE 1501 on preorder for $99? Seems to be equivalent to the Tempest and 15 DVC.
     
  8. ThomasW

    ThomasW Cinematographer

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  9. Chris Carswell

    Chris Carswell Supporting Actor

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    Jeff; Are you married? [​IMG] You know where that is going. WAF!!!
    Jim; $100 hell yah. Wow those look gooooood but,when are they shipping[​IMG]?
    Thomas; I know.....What was I thinking. I did see an 18" for the same price as the tempest that went to 26hz but that is still a little high.
     

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