I hope not. Ls50 metas are great within their limits but their limit is spl level. I use a sub with mine and do not feel inclined to go louder than 90db even in the small room they are in. Maybe if I used an active crossover to roll off the low end on the metas that would help some I am sure.
I have large Ohm F5 in the next room off same amp. These are comparable in size to the KEF blades but cost way less. Those go loud and clear with no strain in comparison to metas + sub.