i am about to design a box for some new subs and i'm just wondering if you have to account for the amount of room the sub takes up or not. if the manufacturer says 1 cubic foot enclosure, is that before the sub is in the box or after? it's the first time i have attempted designing a box so please help me out here.

 

yes.. u have to take the speaker into consideration.. it will take up air space... it might say that in the manual for the subs... i know my Solo baric L5's did... but anyway.. someone correct me if i am wrong..

Peace

 

in the woofers manual it should tell you the Displacement

 

yeah. most 12" subs have around 0.18 cubit feet of displacement

 

As for a sealed enclosure, sub displacement doesn't affect the design as much as it does for a ported or bandpass enclosure.Ported/B.P. are much more sensitive to internal enclosure volume.