Trelga, Excuse my ignorance, but why does dual volume controls have nothing to do with dual mono design? Presumably you could have a dual Mono amp, with a single volume control at the end of the signal path, but I am not sure how you could have dual volume controls, without a dual mono design. In which case, dual mono is a prerequisit, for dual volume controls. Perhaps there is a fault in my logic somewhere.
I have just aquired on Dem, an Emille K40L, integrated, which does have dual controls. I do'nt find it a bind at all to balance the 2 sides and it does allow for assymetry in the room, without adding a further step in the signal path, which a balance control represents.