Kills ALL low notes? Sealed? KILLS them? Cool.
Anyway, If you weren't looking for lots of bass then why on earth would you get MTX9500's? "Tight" bass would have been better acheived with a PLETHORA of other drivers.... oh well good luck.
Also, Loosening materials, and braking in for the purpose of preventing future failure, would you like some cobra oil while you're at it?