Skunk, full range speakers don't generally have a high-pass filter to
cut off the bass for the woofers.  The mechanics of the woofer and the
enclosure do that naturally.  It's better to have an electronic or pure
electrical (passive) crossover to do that.  It gives you control and
knowledge of the exact frequency, slope, and tuning of the filter so
that you can match up with the high-pass filter on the subwoofer.

It also eliminates wasted motion of the woofers in your main speakers. 
Especially in a sealed enclosure the woofer still moves when excited by
the frequencies below the bass cutoff, but not enough to produce useful
sound.  That's a potential source of distortion and/or wasted energy.

Jon, the slope of the cutoff for a sealed box is 2nd order.  The slope
for a ported box is 4th order.


-- 
John Stimson
------------------------------------------------------------------------
John Stimson's Profile: http://forums.slimdevices.com/member.php?userid=218
View this thread: http://forums.slimdevices.com/showthread.php?t=20907

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