yeah, if we are talking 1 note on a mic 2 15's still have a chance. I meant more on music where it would be alot harder for the 15's to keep up. Shitty installs do happen though.In theory, but you also have to consider the install and this guy doesn't strike me as the fastest sperm in the scrotum, so you have to account for cancellation in a bad install, and not always will displacing more air put up better SPL numbers.