Simple Formulas and Graphs for Design of Vented Loudspeaker Systems
This paper gives formulas for designing both fourth-order and sixth-order (equalized) systems for a given woofer. The formulas specify the frequency to which the box must be tuned, based on the woofer parameters. The designer has a choice of box volumes and cutoff frequencies (which are related). Graphs of the frequency response (versus box volume and woofer parameters) are also given. The graphs are scaled in units of Fs/Qt and VasQt squared, which makes them applicable to a very wide range of woofers and box sizes.
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