i dont know if i would say alot... i have a friend with 2 l7 15's in a dodge avenger with 2 rockford 500's =149.2 db not that i am saying anything but i should be right about there if not over that....the l5 handles 75% of the power, l5 is more eff. and has a whopping .04" less in xmax. course it has a stamped basket and no titanium coated cone but from past expirience i never bent a basket nor do i run my system to create cone flex.(l5 has one of the most rigid cones i have seen anyways)...in other words the l5 is still a very impressive woofer sans the cast basket. the avenger has a small sized sealed box that he made to fit his car it is about 4 cft. some might say his #'s are low but it is set up well enough to say that he has to turn it almost entirely all the way up before it even hints to distorting and of course it is a trunk loaded car. also from what we read the bd 500s put out 700-800 watts reactive into a 2 ohm load