The interior volume is 108L but with the soundstream T4-15 in and the big port is 92L. I wanted to make it a little bigger but it wouldn't fit in my car...
Ahh.. When you said net volume I thought you mean before displacement.. 3.24cubic feet is not too bad for a 15" after displacement.. I've ran 5.4cubic feet for my two 15"s because that is all i could fit in the trunk of the Jetta.. just meant i could throw more power at the sub with the smaller box