If have I to choose between this two I would defently buy the ATC which consider to be very neutral and natural a little bit on the analytical side but very good overall.
Regarding the KEF LS50 I didn’t listen to them but if you Google on other forums there are many owners that were disappointed from them ,they don’t handle bass very well, don’t go deep enogh on the low frequencies and tend to be very bright.
Regarding the KEF LS50 I didn’t listen to them but if you Google on other forums there are many owners that were disappointed from them ,they don’t handle bass very well, don’t go deep enogh on the low frequencies and tend to be very bright.