Uhhh... Flakko... on IA's forum, that test didn't involve LIs. It involved 187s..last time i asked, they only had the 187's in stock... the DP is a pure SPL sub (or i think it is) more like an MT? i dunno
edit: all i know is that moe lester and some other people did a test with an LI vs an SE, the LI was 2-3 dbs LOUDER than the SE
that says somethingWhile the DP is their spl oriented sub it sounds INFINITELY better than my DD 9915s...and is equivalently as loud