Well I finally bought the Pass X600 and compared them to my Krell FPB750MCX. To my opinion they were more musical and sounded better and warmer.
Since the Pass sounded so good I sold both the FPB750MCX and the Pass X600 and bought the X600.5.
Now they are just playing in and I love the sound. They are musical and rich sounding. However I can not realy say they are much better than the X600. I sold the X600 before I bought the X600.5 and the 600.5 is new and is playing in now. I have the feeling they are more smooth sounding but the difference is not that big yet.
Peter
Since the Pass sounded so good I sold both the FPB750MCX and the Pass X600 and bought the X600.5.
Now they are just playing in and I love the sound. They are musical and rich sounding. However I can not realy say they are much better than the X600. I sold the X600 before I bought the X600.5 and the 600.5 is new and is playing in now. I have the feeling they are more smooth sounding but the difference is not that big yet.
Peter