Hi Leude, I have some questions that I hope you can answer… And although I want to build a bass reflexbox myself, how do I expect that volume to get the best bass yield out????? I thought in my plan on a box with 2 subs in a box, but still for stabilization, with a board in the middle separated. There should be 30ér subs. And no matter the problem, they box, should not become too big, as it should be installed in a lupo. , in short: a bass reflex box, with core bass that fits into a lupo. And one more question at the end, have you had experience with the brand MC fun, if so which one?