i no its 1.6 or 1.8 ported tuned 2 32hz but i have it in a 2.6 cuft ported box tuned @ 32hz sounds pretty go0d but i was runnin it off an home stereo amp 150w dunno yet till we get the re 12.1 but ported boxs dont sound that go0d in the back of a fire bird hatch back an after i test wit the 12.1 an it dont sound like i want it 2 i can always go seald an a seald box sounds better than ported in there dunno y but if i do go seald i no the specs. are i think .8 cuft can i always go bigger like a 2.6 seald or no u tell me