BC ref100mkII is definitely not for those looking for very warm tube sound in an amp.
My experience is it delivers what is fed into it, ie if you use tube pre-amp and/or source, the sound of those will be delivered, but does not deliver any tube-like warmth in of itself.
Having said that, the midrange in my system is sublime along the lines of more neutral sounding tube gear I have heard but I would attribute the midrange to the combination of components not to the BC amp alone itself. it is not a substitute for those who must have a tube amp to be happy or to drive their particular speakers properly if those speakers are designed to work best with tube amps.
My experience is it delivers what is fed into it, ie if you use tube pre-amp and/or source, the sound of those will be delivered, but does not deliver any tube-like warmth in of itself.
Having said that, the midrange in my system is sublime along the lines of more neutral sounding tube gear I have heard but I would attribute the midrange to the combination of components not to the BC amp alone itself. it is not a substitute for those who must have a tube amp to be happy or to drive their particular speakers properly if those speakers are designed to work best with tube amps.