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Reload Thread: 9515 DUMAX Results

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    9515 DUMAX Results

    http://www.betteraudio.com/geolemon/9515/DUMAX.htm

    Was posted at SIN, thought people may find it interesting to look at here as well.

    - Steve



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    Nice BL curve

    That report just goes to show that the DD is a SPL driver...





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    12.9 mm of XMax...wow.



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    looks like a **** good SPL driver.. but how do u interpret the KMS and BL curves?



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    Originally posted by RangerMan
    12.9 mm of XMax...wow.

    I thought you needed xmax to be loud obviously not



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    Originally posted by slipknot87420
    I thought you needed xmax to be loud obviously not
    Naw...check out the RFL...driver is unlinear as hell.



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    Originally posted by RangerMan
    Naw...check out the RFL...driver is unlinear as hell.


    I thought it had 4 inches of excursion?



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    Originally posted by BDIDDY
    I thought it had 4 inches of excursion?
    So they claim...but thats not XMax



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    yeah that is a **** BL curve i must admit. anyone have the DUMAX for the brahma??

    adam



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    brahma - http://www.adireaudio.com/Files/BrahmaDumax.pdf

    still wondering what BL and KMS curve shows..



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    BL is the flux density in the magnetic gap (B) and the length of the VC in the gap (L).

    Usually a higher BL= higher sensitivity and lower Qes. Mms could affect this, however. If the woofer has a high Mms, it could have a low sensitivity and higher Qes, despite the BL product.

    People are taking these DUMAX results too seriously IMO...

    Xmax doesn't mean much on a SPL driver if the motor isn't strong enough to push it that far against pressure...

    Wiring coils in series will double the BL...but that doesn't double the motor strength at all...just changes the Re of the sub...





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    Numbers mean **** all.




    Is this not a reasonable place to park?

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    Originally posted by m_harrison
    Hold on here...you mean numbers aren't everything??? Man, I've been living a sham!
    - Steve



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    RangerMan's Avatar
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    Originally posted by snova031
    BL is the flux density in the magnetic gap (B) and the length of the VC in the gap (L).

    Usually a higher BL= higher sensitivity and lower Qes. Mms could affect this, however. If the woofer has a high Mms, it could have a low sensitivity and higher Qes, despite the BL product.

    People are taking these DUMAX results too seriously IMO...

    Xmax doesn't mean much on a SPL driver if the motor isn't strong enough to push it that far against pressure...

    Wiring coils in series will double the BL...but that doesn't double the motor strength at all...just changes the Re of the sub...
    Ladies and gentlemen...a perfect example of the COPY/PASTE function on your computer.



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    Randy Savage's Avatar
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    Originally posted by RangerMan
    Ladies and gentlemen...a perfect example of the COPY/PASTE function on your computer.
    Some of it was...got the definition of BL from eatel...

    But a lot of it was just stuff I have written down or just things I've noticed...






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