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Old 01-22-08, 03:52 PM   #8 (Link)
 
ec114
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Re: DIY TC Sounds LMS-5400 18" sealed 100L


Quote:
Ilkka wrote: View Post
It's a plot of the harmonic distortion by component along the "110 dB SPL" curve so for example at 20 Hz the SPL is ~100 dB. That means around 19 mm of excursion which translates to ~2.9% of air spring distortion (mostly 2nd harmonic) per Linkwitz. Of course that's just the theory, at least I haven't seen any real measurements on this subject.
Doh! I guess the as-tested maximum output of 106dB@20Hz would rule out 110dB there. Not thinking so well; anyway, 2.9% due to box makes the driver look even better, and a larger box more attractive technically, if not aesthetically...


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