I'd probably say SPL. I've owned a CVX12, not quite the same thing, but my BL sounds better when it's loud compared to my old CVX, it seemed to have very little SQ. Test it out in your car before you trade off. Just because it may be loud in his car doesn't mean it will be loud in yours.we are both in Myrtle Beach. its one of my buddies saying he is trying to sell the L7 and get some d3"s so i was just sitting here and tryin to figure out what to do lol. is the L7 a spl sub or a sq sub?