in spl yes the L7 probably could win. i we are talking either the 15" or 12". but for overal sound quality an loudness the tempest in my opinion is the better choice. right now i am thinking about getting a tempest.
Sorry about that....I want to compare 2 12" L7's to 2 Tempest...I know 2 15" L7's would out do 2 Tempest, I just don't have the money right now for 2 15" L7 and a box