I think it would be fun to build a basscab this summer. A 2x10" no tweeter cab (I already have a 2x12" with tweeter and just want some more punch). I´d like to use the Eminence Kappa pro 10 or the Legend B102. When I put in the values for the kappa here I got an optimum volume of 10.3 liters. Not that likely I guess. Im not that good at calculating (as you can see)but I know how to use the tools and how to build a cab. So could someone please help me calculate a good volume and porting dimensions for two of these speakers?