Over the holidays my audio and music loving friends came up for the weekend and we listened at relatively high levels to my CS6s for hours on end playing much vinyl and enjoying the wonder of great music and sound. They have Vandersteen 5As and I do the same with them whenever I go to visit them. Neither speaker type, Thiel nor Vandersteen is harsh. I power mine with Krell, yes with the "harshest" of amps through the "harshest" of speakers. Can you imagine? Oh the humanity! And it all sounds so damn good, warm and detailed. Man, I must be doing something wrong.