I have no experience in enclosure construction at all and have been tearing through forums for some helpful advise in enclosure designs. I am pretty confused at this point about some things and was wondering if anyone could clear it up? I am under the impression that if a certain speaker is in a smaller enclosure that it will handle more power and a larger enclosure will be more efficient (less box rise). so if that is true, will they be equal in spl if they receive the same amount of power (after rise) rather its in a "smaller" or "larger" enclosure? i have also heard of people covering ports to play with their tuning, is this just a solid cover reducing the height/width of the port? does it have to be as deep as the port or just cover the outside? the setup: 93 mustang hatchback 150A alt shuriken bt-60 and bt20 brz 2100.1 (clamped at 1172w @47Hz) 2 fi ssd 12s in a prefab box ~1.6 cubes per chamber ~38Hz Im pretty happy with the setup as is but i want to get a little more "pressure" from the 12s(didnt really want to sacrifice the back seat but oh well) sorry if the questions seem a little on the dumb side, help is greatly appreciated!