I just did a pair of 10 IDQv.3's ported in an 08 Chevy crew cab. I have a Cadence ZRS 7000D 1000watts RMS powering the subs. I'm not 100% certain what the specs are on the enclosure as I had it build by a local shop. I did a quick measurement just to see. I plugged in the numbers and looks like did 1.5 cubes per sub with the 4 inch round port just under 20 inches. Looks like the Sub data sheets calls for 1.5cu ft for Audiophile enclosure. ...But it sounds incredible!! I have had ID's, IDQ's and several other setups. So far I'm very impressed with these new subs. After seeing them released, I had a strong feeling these were going to be really good... But they are in fact awesome! I dont believe the 12's are shipping yet. You may want to try to call ID next week to see if they have shipped any.