This question is directed mainly toward greg but anyone feel free to answer. I'm working on a box design for a friend's sister's s series blazer. Going to use a JL 10 W0, when calculating box volume do I subtract the volume the sub itself takes up? If I remember right I subtract the volume the port takes as well correct? Since my port will be inside the box. Like em big and topless Excuse me...Would you mind removing your import from under my chevy?