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<blockquote data-quote="VWBobby" data-source="post: 7604704" data-attributes="member: 624844">Au Contraire, Mon Frère!&nbsp; //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif&nbsp; Lets say the sub is playing at 30hz.......&nbsp; It is obviously vibrating at 30 times a second.&nbsp; 30hz does not imply that the subwoofer is reaching full xmax and returning to zero at 30 times a second.&nbsp; Lets say the DD sub has a 25mm xmax and an LMS Ultra has around 54mm.&nbsp; Its going to take a lot more speed, power and possible motor force for the LMS ultra to move full xmax at 30hz compared to the DD.&nbsp; The LMS will obviously be moving more air, but it might not be doing it as quickly or efficiently on the same power.&nbsp; &nbsp; This also comes back to the mass x acceleration issue.&nbsp;&nbsp; If you have a sub that is a lot more efficient with the frequency it is playing at (its peak), it will out perform the other at the same frequency.&nbsp; This is also combined with the stacking of waves or in essence making a harmonic effect which will boost a good 1-2 db or more.&nbsp; This gets into the more complicated port tuning effects and effectively turning the sub into a &#039;horn&#039; at a certain frequency for maximum spl (read: zero SQ).I completely agree on the 3 slugs verses 2 slugs debate.&nbsp; If you have enough room for your coil travel, you can actually shoot past the peak BL point of the motor and have more efficiency in the process.</blockquote>

[QUOTE="VWBobby, post: 7604704, member: 624844"] Au Contraire, Mon Frère! [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] Lets say the sub is playing at 30hz....... It is obviously vibrating at 30 times a second. 30hz does not imply that the subwoofer is reaching full xmax and returning to zero at 30 times a second. Lets say the DD sub has a 25mm xmax and an LMS Ultra has around 54mm. Its going to take a lot more speed, power and possible motor force for the LMS ultra to move full xmax at 30hz compared to the DD. The LMS will obviously be moving more air, but it might not be doing it as quickly or efficiently on the same power. This also comes back to the mass x acceleration issue. If you have a sub that is a lot more efficient with the frequency it is playing at (its peak), it will out perform the other at the same frequency. This is also combined with the stacking of waves or in essence making a harmonic effect which will boost a good 1-2 db or more. This gets into the more complicated port tuning effects and effectively turning the sub into a 'horn' at a certain frequency for maximum spl (read: zero SQ). I completely agree on the 3 slugs verses 2 slugs debate. If you have enough room for your coil travel, you can actually shoot past the peak BL point of the motor and have more efficiency in the process. [/QUOTE]

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