Reply to thread

Message

<blockquote data-quote="boogeyman" data-source="post: 6522548" data-attributes="member: 606913">here ya go ciaonzo........sealed volume to achieve a target QtcYou may substitute any Qtc between 0.50 and 1.50 in place of 0.70 in both equations (both must have same value) to experiment with enclosure size. Qtc of 0.70 is generally considered an optimum alignment, with very good transient response, low cut-off frequency, and flattest response to the cut-off - See Qtc.Note: You must always choose a Qtc higher than the driver&#039;s Qts!Find alpha: X = (0.70 / Qts)^2 - 1Then calculate enclosure volume: Vb = Vas / XSystem resonant frequency: Fcb = 0.70 / Qts ( Fs)To find the theoretical cut-off frequency, use the following chart to find the F3 factor:QtcF3 FactorQtcF3 Factor0.50= 1.551.00= 0.790.60= 1.211.10= 0.760.70= 1.01.20= 0.740.80= 0.91.30= 0.720.90= 0.831.40= 0.71Then: F3 = Fc x (F3 Factor)</blockquote>

[QUOTE="boogeyman, post: 6522548, member: 606913"] here ya go ciaonzo........sealed volume to achieve a target Qtc You may substitute any Qtc between 0.50 and 1.50 in place of 0.70 in both equations (both must have same value) to experiment with enclosure size. Qtc of 0.70 is generally considered an optimum alignment, with very good transient response, low cut-off frequency, and flattest response to the cut-off - See Qtc. Note: You must always choose a Qtc higher than the driver's Qts! Find alpha: X = (0.70 / Qts)^2 - 1 Then calculate enclosure volume: Vb = Vas / X System resonant frequency: Fcb = 0.70 / Qts ( Fs) To find the theoretical cut-off frequency, use the following chart to find the F3 factor: Qtc F3 Factor Qtc F3 Factor 0.50 = 1.55 1.00 = 0.79 0.60 = 1.21 1.10 = 0.76 0.70 = 1.0 1.20 = 0.74 0.80 = 0.9 1.30 = 0.72 0.90 = 0.83 1.40 = 0.71 Then: F3 = Fc x (F3 Factor) [/QUOTE]

Verification