I just recently got a 15" SI D2, the new models that are logoless, for graduation and I was wondering what you guys had running to yours. I have a 4 cu ft box tuned to 28 hz in the back of my explorer being ran by a 1500 hifonics. The highest I ever hit was 145.1 on a bass track and 144.4 on lil jon - get yo chullin out the street. So far I have been pretty impressed but I thought it would have gotten louder when I first bought it. Maybe I should have tuned the box higher? What do you guys have and what are your results?
