Krell FPB 300cx enough to drive B&W Nautilus 801?

I auditioned both the 300cx and 400cx in my home system before I bit the bullet and dug deeper to purchase the 400cx. I have Thiel CS6s. The 400cx made an immediate audible improvement in dynamic contrast, air and detail and bass extension and sped with these speakers, which require much current to drive properly. My wife confirmed (thank heaven for small miracles!) The only thing that prevented me from getting a 700cx was simple lack of $$$$$! But I not hesitate if I could swing it.

I agree with Drrdiamond on this. It was not my goal to simply have more power, and besides, the wattage output gain between the 400cx and 300cx is really insignificant when it comes to sound pressure levels. My goal was to see if there was truly a qualitative difference at the same SPLs I normally listen to (usually b/w 70 to 80 dB with digital meter at 10 ft). The 400cx made a qualitative difference. I wish I could provide feedback about this for speakers that are easier to drive, such as B&Ws, Meadowlarks, Dunlavys and Vandersteens.

Liszt458: please send us your impressions when you're settled in with the 400cx.

Nice amps!