Ok I have a box for 2 12" subs. I got it from a friend for free. He had 2 12" Kicker Comps. OLD . The box had a bunch of cotton or whatever in it when i took the old subs out for my new ones. I left the cotton crap in. What is that for? Also how can i figure out the area of the box? Is it with or with/out the sub in the box??
volume is WxDxH the "cotton crap" is polyfill. it makes the box appear about 10% larger than it actually is to the speakers by slowing the sound waves. It also helps decrease standing waves.
and would the same sized box be used for 2 12" Cerwin Vega V-MAXs?? I am looking into upgrading to 2 of those and adding another 311D to run one off of. So 2 MTX 311Ds running 2 V-MAXs. What is the best box size for one of thsoe??
John I did what Johnathan said and put my Cerwin V-maxs in a 1cf sealed box with 1 pound of polyfill on each side of the box and it sounds great. Try that.
So if the ideal box is 2.4 cu ft and i would wish to make the box smaller than it states so i put some polyfill .... How much polyfill must i put in the box and what would be the volume of the new smaller box ?
no. you use a pound of polyfill PER cubic foot of net volume in the box. this results in the box appearing about 10% larger than it actually is to the sub.