|Let's simplify the matter.|
I'm at a real loss here to think of tube amp makers whose amps are both auto bias and have good power, say around 200 wpc or more @ 8ohms?
Might could go as low as 150-175 but I feel 200 @ 8 is about right, and would like to get as close to that spot as possible.
BTW... Non bridged amps.