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Ett svar är tex : So yes, more specified xmax does mean more SPL but only for lower frequencies.Often times when people want more SPL, they really need higher sensitivity in the form of higher BL product or less moving mass, rather than more xmax because 50-60Hz is really what they are after. This is a very sensual frequency range for humans and much of the bass in music content exists in that frequency domain.

http://www.audiopulse.com/know-how/subw … ubwoofers/

Mvh Niklas