Well right now my mag is in a 4.0 cu ft box tuned to 28 hz. Its nice and clean and gets pretty loud but I want a lil more SPL out of it. I heard if I tuned up around 35 hz it would get a lot louder but my question is how much sq will I be losing? I really dont want to lose too much sq but want it a bit louder. What do you guys suggest?? And in what kind of enclosure did you get your best results?