Revolutionary Engineering The LS50 uses KEF's revolutionary Uni-Q driver, which was originally created for our flagship Blade loudspeaker. The Uni-Q driver places the tweeter directly inside the acoustic center of the mid-range driver to radiate an impressively wide and realistic soundstage with a remarkably clean sound. This technology combined with the LS50's cabinet construction ensures your music will sound true to the original recording, and most importantly, there is no single sweet spot — the whole room is the sweet spot. This unaltered delivery makes the LS50 monitors perfect for home listening, as well as perfect for studio use.