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<blockquote data-quote="sundownz" data-source="post: 7755739" data-attributes="member: 549523">Also to be considered is MMS... divide BL^2/RE by MMS and you get a figure that is typically less than 1Assuming both woofers have the same style of spider and an FS about the same this figure can predict SPL very well... for example if you ended up with 0.5 on one woofer and 0.75 on the second woofer; the 0.75 woofer could be as much as 1.5 dB louder.Again... this assumes a few things about the suspension and FS. If one driver has an fs of 35 Hz and the other an fs of 60 hz then the result will not be very useful... or if one woofer has a highly parabolic CMS curve and the other sub has a flat curve this will also throw things way off once they start moving.You can get a HUGE BL^2/RE using, for example, an 8-layer copper coil -- but the gigantic MMS will likely cancel out all the gains in motor power and then some.The Warden, especially since IA revised the coil to a 4-layer, has a very reasonable moving mass.</blockquote>

[QUOTE="sundownz, post: 7755739, member: 549523"] Also to be considered is MMS... divide BL^2/RE by MMS and you get a figure that is typically less than 1 Assuming both woofers have the same style of spider and an FS about the same this figure can predict SPL very well... for example if you ended up with 0.5 on one woofer and 0.75 on the second woofer; the 0.75 woofer could be as much as 1.5 dB louder. Again... this assumes a few things about the suspension and FS. If one driver has an fs of 35 Hz and the other an fs of 60 hz then the result will not be very useful... or if one woofer has a highly parabolic CMS curve and the other sub has a flat curve this will also throw things way off once they start moving. You can get a HUGE BL^2/RE using, for example, an 8-layer copper coil -- but the gigantic MMS will likely cancel out all the gains in motor power and then some. The Warden, especially since IA revised the coil to a 4-layer, has a very reasonable moving mass. [/QUOTE]

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