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Message: <blockquote data-quote="T3mpest" data-source="post: 8086016" data-attributes="member: 560148"><p>basically if a sub is effecent, it has a high motor force, and low MMS.  This leads to a high FS low Q driver.  This makes the driver less suited for low end output, especially in a sealed box.  Basically less effecient drivers have less output in the upper bass/watt, but they roll off slower as you drop in frequency.  Higher effeciency drivers start louder at say, 100hz, but by 30hz will be less effecient.  Usually you want a compromise between the 2 and ultimately, most SPL is about having high, XMAX, BL, and powerhandling.  A good mix of those 3 is usually best for daily listening SPL.</p></blockquote><p></p>

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