Could not use it during lunch as the unit was quite cold and I was worried about humidity so I turned up the heat and will plug it in around supper time, go do my sport and come back to listen. I suppose the first thing I will notice is low volume listening as the kids will be in bed so this will be a good test compared to my 4B-ST as I have listened many hours this way in the past.
Physically it is bigger and even better built than the ST series. The binding posts are much better and now I will be able to bi-wire my logans with spades and bananas at the same time. The new switch is better as well and the front silver plate with handles is much thicker and looks great.
Now if I could only figure out this 1volt - 2 volt thing. Some say use the 1v and other the 2v for balanced connections!!!!