I recently ordered this driver and the 150W plate amp from Parts Express. I had the intentions of making a vented sub tuned to around 20hz in a 120L box. I downloaded Unibox and entered the specs for the 12" DVC. The program has recommended a closed enclosure with a volume around 86L with a Qtc of 6. A few questions: What do you guys think of these numbers? Would you recommend a closed before a vented sub? Is fill necessary? If so, how much? The max power input is 136W. Should I decrease the box size so the max power is increased to around 150W (my amps max)? Would this better protect the driver? In the end I want a sub that will perform well for movies. Thanks for your help.