It is only on certain tracks that I’ve noticed it , my speakers are not the most efficient either.Your experiences of Croft integrateds are very different from mine. Either there is a mismatch in your system, or a valve is on the blink. So yes, a new one (or three) may help IMHO.
Exactly, I’m used to my Roksan k3 or Restek fantasy II or the Yamaha ca2010 , I think I’ll stick the Croft in the second system with some of my less hungry speakers.I would think you'd need a pretty hefty solid state amp for those B&O speakers. I speak without direct experience but the specs are not Croft-friendly, more Krell-friendly!