All I can say is that running a BAT preamp with Emotiva power amp will result in a very dry, without good top end extension and hard to listen to at higher volumes.It would be good to get a warmer sounding pre to go with the Emotiva amp. In my opinion. McIntosh is the first name that pops into my head but their are others (Audio Research, Modwright,)that would give you a warmer more natural sound and much more musical overall. I have owned the BAT 31se with 6H30's and was highly unimpressed, "super tubes" Good thing BAT is the only one who has these tubes "super dry" if you ask me.
Matt M
Matt M