I am facing similar situation! Everything is there, sweet detailed, but it is too far out, way behind the speakers. You might not have to spend much more $ for the ** amp to get your speakers come to life?! But that will be at the expense of something else that only your tube amp does. I decided not to experiment with ** amps! Get another MV60 and use it as mono? If you can! Or change your speakers.
You said: ... no SS discussion?
You said: ... no SS discussion?