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<blockquote data-quote="ky babyn" data-source="post: 478034" data-attributes="member: 553176">Vb= the reqired internal volume of the enclosureF3= the frequency that the response is down by 3 db atFb= the frequency that the vent needs to be tuned toVas= the equivelent stiffness of your driverFs= the free air resonance (this is your tuning frequency its a good rule two build it a few Hz higher than what your drivers requier because if you dip below your driver Fs the sound will get muddy.to calculate yourVb=Qts^(2.87) x 15 x VasFb=Qts^(-0.9) x 0.42 x FsF3=Qts^(-1.4) x 0.26 x FsTo port you are going to need these specs: Vb, F3, Fb, Vb, Qts, Vas, Fs, Xmax,the required volume for each driver, the diameter of port you are using (inside diameter)&nbsp; Find these out and i will do the math. i just figured this stuff out with the use of some calculaters. what program do you use?</blockquote>

[QUOTE="ky babyn, post: 478034, member: 553176"] Vb= the reqired internal volume of the enclosure F3= the frequency that the response is down by 3 db at Fb= the frequency that the vent needs to be tuned to Vas= the equivelent stiffness of your driver Fs= the free air resonance (this is your tuning frequency its a good rule two build it a few Hz higher than what your drivers requier because if you dip below your driver Fs the sound will get muddy. to calculate your Vb=Qts^(2.87) x 15 x Vas Fb=Qts^(-0.9) x 0.42 x Fs F3=Qts^(-1.4) x 0.26 x Fs To port you are going to need these specs: Vb, F3, Fb, Vb, Qts, Vas, Fs, Xmax, the required volume for each driver, the diameter of port you are using (inside diameter) Find these out and i will do the math. i just figured this stuff out with the use of some calculaters. what program do you use? [/QUOTE]

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