Krell x-series, are ther any sonic benifits?

700cx arrived at my house and I fired it up last night. Sony SCD-XA777ES -> BAT VK-50SE -> FBP700cx -> B&W N-802

Even out of the box, it sounded different than what I was used to before it went through the upgrade. It sound more transparent than what it was - showing all the VK-50ES can do the tube magic (and not necessarily the most accurate reproduction I could have achieved with KCT with CAST II).
However, to my ears, it has perfectly balanced (unnatural) euphonic sound with detail, tranparency, and dynamic sound that is very pleasing.

I will report more as I learn further.

Ki

Side-by-side comparison for an individual would be difficult. I personally don't know of anyone who has a pair of FPB amps... However, I sent my 600c for the upgrade. Time will tell. Although I won't have the opportunity to compare side-by-side of before and after the upgrade, I usually hear the biggest differences in audio gear when I first insert it into my audio chain. So, I will report when I hear it.

Actually the 600C upgrade to 700Cx would cost whopping $2000... According to Krell, it will operate exactly the same as the new 700cx once the upgrade is done. It will have minor cosmetic changes; one on the face plate to make it identical to the new onces and a new sticker with 700cx ID for the back.
I have not asked them about the CAST II. I will do so.

In case I forget, please send me a note in couple of weeks. The amp is scheduled to be back in 1.5 week.