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From: dlin@prodigal.psych.rochester.edu (Daniel Lin)
Newsgroups: rec.audio.high-end
Subject: Crossover design
Message-ID: <9172@uwm.edu>
Date: 28 Jan 91 13:58:10 GMT
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	This business of designing a crossover is getting more and more 
	confusing as I read into the literature. Many of the recent 
	articles concerning crossover design in Journal of the Audio
	Engineering Society have focussed on high order crossovers, while
	providing little or no information on the optimization of "simple"
	first order designs. 
		My initial query regarding the optimum crossover frequency
	required to obtain unity reponse at the desired frequency was 
	answered (thank you) but several questions remain. Assuming that
	one is interested in designing an all first order network for a
	three-way speaker system utilizing "ideal" drivers- that is, the
	drivers are well behaved beyond their pass bands, show a smooth
	change in directivity across frequencies, and are free of
	contributions from the cabinet (e.g. diffraction loss). The
	literature suggests that equations used to determine low and high
	pass filter componenets cannot be applied to design the bandpass
	filter due to interactions between components. What kinds of
	calculations are required to determine the necessary adjustments?
	Are any adjustments needed for woofer's low pass or the tweeter's
	high pass crossover values? 
		I suppose that once these questions are answered, I'll have
	to return to real world conditions to begin to optimize around
	driver limitations and cabinet effects. 
		Thank you for your comments.

		Daniel Lin
		University of Rochester