Hard to say. The LS3/5A's were intended for mobile and small studio recording where you wouldn't be expecting deep bass anyways...

I don't think they were intended as the primary speakers for mixing down a symphony orchestra performance although they would serve as "typical good" speakers.

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8