I would say yes. I had a FPB 600. Once I placed it on a steel beem cut to the size of the Krell (placed on tile over concrete floor) the sound improved a tremendous amount. Also a nice upgrade for little to no money. I Also liked that the amps were high in case of flooding (never happened).
Amp stands for Krell 450 monos?
I now have my new 450mcx monos (wonderful amps!) direct on a wood floor. Is there a big improvment in sound putting them on stands? Which stands? I use Audio Artistry Beethoven speakers and I play loud so there is for shure floor vibrations!