I have been testing several older Krells...my research with the 1st gens (fan cooled) is that they have very good sonics but are somewhat prone to reliability issues with clogged fans and thus running hot over the years. I am having great success with the 2nd gens (KMA 160s, KMA 400s, KSA 200). They are very detailed and holographic with endless low end. I do not find them "white" sounding like others have suggested. In fact, the 160s sound very organic, and that is from a SET guy!
Peter
Peter