O not saying you were the one calling me dumb.
Yes it is a big sub. but you got to think about the space inbetween the spider and the cone. there is a nice little gap there. so maby you guys are not accounting for that and looking at the whole sub instead of what on it really displaces air.
I dont know. david just said it was 0.24 and made a typo when he put 0.4 so the best bet for the guys that dont belive me or him reply in that post and have him answer it.