Unless you have a W7 JL Audio does not stand a chance. Check their site. You will not see any of their subs with over 600 RMS. And I know what you wills say! Oh, well they under rate it for competitions. Let's just say they did. Let's even say their actual RMS was TWICE the RMS that they show. That would be 1200 RMS for their best speaker. And let's also say that Kicker underrated theirs too and it was actually 1200 RMS (1,000 RMS shown). Now, the Kicker has #1 More XMax (0.61 inches I believe) and #2 More cone area (The 15 which I am considering is Approx. the size of an 18). Now with all of those reasons please tell me how a JL Audio sub, any sub but the W7, could outproform a Kicker L7! I do know that the Eclipse ones could outproform the Kickers but I say no to the JL's. The L7 is more powerful in every way to the JL's.