diyAudio Forums Archive > Top > Other Stuff > Electronics and Parts high-pass filter (low-level) - Click HERE for Original Thread keyser hi guys, does any of you know how to make a 3rd order high-pass filter for use at low-level at 40 hertz, and one at 50 hertz? (i'm new at this) tanx jackinnj what impedance is the network driving? keyser eeuhm... i'm not too educated on the subject:) (yet) it's to be used between a plateamp (subwoofer) and my poweramp. Would this info do, or should i look up the exact number? peranders Have you done any search? Suitable keywords are, analog filter tools http://www.google.com/search?q=anal...=utf-8&oe=utf-8 Here is a good URL:http://focus.ti.com/analog/docs/sam...vigationId=9742 http://focus.ti.com/analog/docs/uti...742&familyId=57

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