I have a Cayin A-70T and this is NOT auto biasing. There is a section in the manual which details how to bias the tubes, complete with recommended voltage settings. It's really a very simple process and you don't have to move a thing to do it, other than lift the cage off.
I searched the net as well and found that the lower wattage models state that those are auto-biasing. Maybe there's something about the US Version (VAS) vs. the others.
I searched the net as well and found that the lower wattage models state that those are auto-biasing. Maybe there's something about the US Version (VAS) vs. the others.