On first glance it *seems* like the more poles, the better. Certainly, the
skirts will be steeper and the bandwidth at the 60 DB point will be more narrow.
But, there is a price to pay for this additional selectivity -- group delay.
The more poles you you have in the filter the worse the group delay spec will
be. So, static crashes and other impulse signals tend to get stretched out.
This can lessen the quality of the listening experience.
Just another thing to stay up late, worrying about. ;-)
73,
-Doug, W7KF
http://www.w7kf.com
Curt Nixon wrote:
GM Neil:
Generally speaking, the more poles in the filter, the more it will
resemble a "Perfect" filter...
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