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<blockquote data-quote="DanWiggins" data-source="post: 606268" data-attributes="member: 544847">Scottie Johnson set quite a few records with Brahmas.&nbsp; Tempests have a BL of 14.2, and Marshall Joyner just won World Finals MR2 for MECA.In other words, BL is not a guideline in terms of SPL...&nbsp; SPL is about displacement.&nbsp; The driver with the most stroke for the applied power wins.&nbsp; Period.&nbsp; You want the motor to be strong enough to reach full excursion with the power you have available in the box you&#039;re running, if you want full-on SPL.&nbsp; If you can do it with a BL or 10, then any BL above that level isn&#039;t really needed.No, doesn&#039;t really mean anything for cone control at all.&nbsp; It does mean less power required for a given excursion level (all else being equal); however, it also means less bass.&nbsp; If you get your BL from lots of extra L, then you increase mass, and lose your efficiency gain.&nbsp; And having a really high BL means you generate a lot of back EMF, so you have higher impedance swings (really only an issue with tube amps).Dan WigginsAdire Audio</blockquote>

[QUOTE="DanWiggins, post: 606268, member: 544847"] Scottie Johnson set quite a few records with Brahmas. Tempests have a BL of 14.2, and Marshall Joyner just won World Finals MR2 for MECA. In other words, BL is not a guideline in terms of SPL... SPL is about displacement. The driver with the most stroke for the applied power wins. Period. You want the motor to be strong enough to reach full excursion with the power you have available in the box you're running, if you want full-on SPL. If you can do it with a BL or 10, then any BL above that level isn't really needed. No, doesn't really mean anything for cone control at all. It does mean less power required for a given excursion level (all else being equal); however, it also means less bass. If you get your BL from lots of extra L, then you increase mass, and lose your efficiency gain. And having a really high BL means you generate a lot of back EMF, so you have higher impedance swings (really only an issue with tube amps). Dan Wiggins Adire Audio [/QUOTE]

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