I like a manual bias as it allows for fine adjustments to squeeze the last drop of performance from the tube and circuit.
Manual vs. Auto Bias
In considering new directions in which to take the evolution of my system, I have run into conflicting claims as to which results in less distortion...auto or manual biasing, according to what product(s) the so called expert manufactures and/or represents...(Surprise!) How about some input from average consumers like myself who have had more experience with one or both?