[sdiy] Filter Musings

[David G. Dixon]

> Excepting the trivial case of two identical filters, you will get a more
> complex behaviour than with a single filter.
> Two 4-pole LPFs in parallel form an 8-pole filter indeed. But you also get
> zeroes, so there will be no 48dB/Oct slope.

But what good is an 8-pole filter if you don't get the 48dB/oct slope?  It's
a bit like having an 8-cylinder engine in your car that's just as gutless as
a four-banger!