I think @rcprince may be right. I have gotten very good results from VTL MB450III mated to my ARC Ref 40 to drive my Q3s. The variable damping factor on the VTLs allows you to optimize for the speakers you are using and address the issues @almarg raises. The VTLs are also very robust with super reliable automated biasing. Even a full on tube failure is handled with aplomb. If you do go the VTL route however you are advised to buy from a VTL dealer as they can be sketchy on support if you don’t have that relationship. Finally make sure to connect the pre and power amp with balanced interconnects.
Replacing my Krell FPB 600 amp with a tube amp
Im thinking of replacing my Krell FPB 600 amp with tube amp . I really love the power and bass slam of the Krell FPB 600.Could i possibly find that with a tube amp? I was thinking of the ARC Ref 250 mono blocks. I am also using an ARC Ref 6 preamp. The only thing i can think of with this much power and bass slam would be the ARC Ref 750se. Any other suggestions and how would the ARC Ref 250s as compared to the Krell FPB 600.