Hi, I recently got myself a nice pair of Infinity kcs120br. I was thinking of finally building myself a sub woofer for my home cinema setup. Unfortunately, I'm not very comfortable in the decisionmaking on what box design I should use in order to get the most bang for the buck / size etc. If there is anyone out there who has any good input whatsoever on how to get the most out of these babies, I'd really appreciate your input. BR and TIA Mikael Infinity kcs120br: Fs=25, Qes=0.45, Qms=8.73, Qts=0.43, Vas=7.6, Re=3.6, Sd=530, Xmax=2.8, Pe=60 power=250W/1000W Size=12"