BIG is about all I can give right now, doing Sirius Lithium channel thru the stack, Anthem, Crown, British tubes.
I think I'm running up against the same thing like the QLS-1, where the living room is to small. I've really got to find a quad set of Amperex 6922 PQ's before I can do some real critical listening.
The Bass, drums on these Watkins are phenomenal, the top end is very good but I need to get further away, they dominate my small space. I haven't tried them with the Krell and other tube pre which has some very good Gold Lion tubes. The idea was to fix these up and sell them to recoup some cash for our 2B's but I can tell you now that's probably not happening.