hello.. i was just wondering how BIG is .65 cubic feet? and how do you messure it when you make a box. thanks..

 

Did you figure this out yet?
check out this link if you didn't
http://www.bcae1.com/spboxnew2.htm

Also, google "speaker enclosure" or something like that and it should keep you busy forever.

as a quick reference 0.525 cubic feet is about 12"x12"x7.5". Remember you need to figure out air space INSIDE the enclosure so if you are using say 3/4" MDF your finished box will be bigger than what I listed above by 3/4" on each side.

Where are you looking at putting your sub(s)?

Let us know what questions you have, I'm sure someone will find some time to help you out!