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Re: 2nd ordrer Butterworth vs 3rd order Butterworth [message #37937 is a reply to message #37923]

Wed, 21 August 2002 11:33

Wayne Parham
Messages: 18791
Registered: January 2001

Illuminati (33rd Degree)

The values of R1 and R2 are usually the same when following a second order or third order of the same crossover frequency. But you might want to confirm this with Spice, because while I found it to be true on many of the circuits I tried, I would not assume that is always the case.

About the JBL 2226J (16 ohm version), Le=3.5mH and Re=12.0 ohms. Zobels are pretty wide tolerance filters, meaning component value shifts have a fairly small impact. I would suggest Zobel resistance of 16 ohms and capacitance of 8uF to 15uF.

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[Message index]

		2nd ordrer Butterworth vs 3rd order Butterworth By: spkrman57 on Tue, 20 August 2002 06:22
		Re: 2nd ordrer Butterworth vs 3rd order Butterworth By: Wayne Parham on Tue, 20 August 2002 14:32
		Re: 2nd ordrer Butterworth vs 3rd order Butterworth By: spkrman57 on Wed, 21 August 2002 06:43
		only UNCUT 511B's ring By: Sam P. on Wed, 21 August 2002 08:22
		Re: only UNCUT 511B's ring By: spkrman57 on Wed, 21 August 2002 10:16
		Re: only UNCUT 511B's ring By: spkrman57 on Wed, 21 August 2002 10:25
		Re: 2nd ordrer Butterworth vs 3rd order Butterworth By: Wayne Parham on Wed, 21 August 2002 11:33

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