Krell 400 lntegrated

IMHO, at the very least not ideal. The Krell 400 is a sturdy integrated and more capable than most, but very few integrateds are fully up to driving your CS 2.4SE's. Those speakers are almost begging for separates, and very robust ones at that.

Unsound is right IMO.  Better yet a tube preamp with a solid state amp.  I always used a tube preamp with my Thiels and it provided the fleshing out of the midrange I was looking for.  Kathy Gornik of Thiel used to say that she never heard a Thiel speaker that didn't sound better with a tube preamp.

Brands that come to mind are BAT, CJ, Belles, Gamut and Modwright.  Add some MIT or Transparent cables and you're set.  Get them CS 2.4SE of yours fired up Jafant.  Good luck and keep us posted.

Much Thanks! unsound and carmenc

Happy Listening!