does anyone know how to calculate the enclosure volume for a sub using the specifications for it? its been awhile since ive done it and cant remember exactly how?

Specifications: * Power handling: 500 watts RMS/700 watts max * VCdia: 2-1/2" * Le: 2.50 mH * Impedance: 4 ohms * Re: 3.1 ohms * Frequency range: 22-500 Hz * Magnet weight: 100 oz. * Fs: 25 Hz * SPL: 89 dB 2.83V/1m, 86 dB 1W/1m * Vas: 2.27 cu. ft. * Qms: 7.03 * Qes: .49 * Qts: .45 * Xmax: 18.7mm * Dimensions: Overall Diameter: 12-1/2", Cutout Diameter: 11-1/8", Mounting Depth: 6-1/2".
any help would be appreciated

 

nevermind i think i may have figured it out. 1.173 sealed and 3.437 vented with a 5"x 47.88" port. would make tuning around 23.11hz. does that sound about right? or am i missing something

 

What the hell sub is this? And tuning to 23 is too low. Its wasting the box, might as well go sealed at that point.

 

12" da mkIII's
ps no critisism its what i have for the moment and money is tight.

 

Tune higher.

 

i think ill just go sealled thats alot of box volume and would be a lot fiberglassing to try and tuck it in this screw. but thanks for the input.