If you're thinking NAD the now discontinued C326bee will drive a pair of LS50'S to good effect. It would appear on paper that the amp is too lean on power but it drives them nicely. It's also said to have some extra oomph on the bottom end which helps with the LS50'S.
IMHO you need a really beefy amp to get the most of of that speaker but there are some lower power integrated amps that have some decent grunt to push them a bit.
IMHO you need a really beefy amp to get the most of of that speaker but there are some lower power integrated amps that have some decent grunt to push them a bit.