[sdiy] more-pole filter

[Ian Smith]

Hey all,

Just a late night random question. Everywhere I look, I see 4-pole Low-Pass Filter. So, why 4? why not 3, or, heck, let's be all Tim Allen for a moment and go with why not 8 or 12 poles?

-Ian

Also, on a completely unrelated topic... is a circuit that sounds like a sick kazoo worth soldering up?
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