EBP question: SAE 1503

Discussion in 'Archived Threads 2001-2004' started by Jack Gilvey, Jan 31, 2001.

  1. Jack Gilvey

    Jack Gilvey Producer

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    Perusing the Stryke site, I saw this 15" DVC driver which models nicely in a vented cab. The SAE 1501,-02, and -03 seems to be variations on the same, with the -02 and -03 progressively more mass-loaded for lower Fs (and lower efficiency). When I plug the 1503 into WinISD for a quick n' dirty, it gives the EBP as 37.2, leaning heavily toward a sealed enclosure. When modelled in a bass-reflex, the extension is outstanding (although in a rather large box). The site lists as suitable for sealed,ported, or PR enclosures.
    So what's the drawback toward using this low-EBP in a vented enclosure?
     
  2. Greg Monfort

    Greg Monfort Supporting Actor

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    BIG cab (~62ft^3), after you factor in VC heating, modest output, except for the in-room peak, and an F3 that's way too low for corner loading (~10Hz). Don't factor it in, it's still big, and it's BOOM CITY when it heats up (every time a big LF spike, or sustained note comes along)! [​IMG] Should be great for war documentaries. [​IMG]
    GM
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    Loud is beautiful, if it's clean
     
  3. Greg Monfort

    Greg Monfort Supporting Actor

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    Addendum:
    It looks good in a ~7ft^3/~9Hz Aperiodic, F3= ~28Hz, and much better than sealed. Great for music (except organ), and apartment HT's.
    GM
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    Loud is beautiful, if it's clean
     
  4. John E Janowitz

    John E Janowitz Second Unit

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    The main problem with using the SAE1503 in a ported enclosure is the large box size needed. The woofer is primarily for sealed box use. The SAE1501 and SAE1502 would be much better for smaller ported box use due to the lower Qts. The 1503 however could give good results in a large ported enclosure. About 12 cubic foot tuned to 18Hz looks very good.
    These drivers will not be available for some time yet though. I am having difficulty coming up with the money for another order right now since I recently invested about $35,000 into the business. The SAE12" drivers will be available much before the 15" woofers.
    John
     
  5. Greg Monfort

    Greg Monfort Supporting Actor

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    >The 1503 however could give good results in a large ported enclosure. About 12 cubic foot tuned to 18Hz looks very good.
    ====
    John, what program do you use? Both BoxPlot and Lspcad shows a larger cab/lower Fb to get max flat at 1W. Increase power and it's underdamped, hence the need for a larger/lower cab. Your sim starts underdamped, and just gets worse.
    Or do you think underdamped in a sub is Ok, and if so, why?
    GM
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    Loud is beautiful, if it's clean
     

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