Xmax and power handling can be extracted from the overall groupof
parameters and interpreted that way, but as soon as you get into the
other Thiele/Small parameters (Fs, Vas, Qts, etc.) you should really not
try and extrapolate driver performance by looking at them individually
or other than as a whole. People that have worked with driver parameters
their whole lives may be able to shortcut some of the number crunching
and judge performance differences by looking at only a few
characteristics, but if you lack that experience do yourself a favor and
plug ALL the numbers into one of the many free web-posted driver
modeling programs, like WinISD etc. and let the software do the work.

JD

Johan Wagener wrote:

what parameters determines the performance of a subwoofer? XMax is how much
the cone can move in and out?(bigger better) ; Fs - the lowest frequency
(lower better?) ; SPL - higher better?