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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?
anjowin

Showing 3 responses by charles1dad

charles1dad's avatar
charles1dad
10,250 posts
 
Anjowin,
I have a push-pull 100 watt amp(6550/KT88 tubes) that requires manual biasing(very simple to preform) that sounds very good. I also own an auto biasing 300b SET amp that`s the best sounding amp(without question) i`ve ever owned thus far.If a auto bias circuit (in theory) adds distortion, that has`nt been my experience at all.
charles1dad's avatar
charles1dad
10,250 posts
 
Marakanetz,
Thanks for bringing up that point. The builder of my Coincident amp as I recall did mention soft startup for the tubes in this design, and said tube life is very long.
charles1dad's avatar
charles1dad
10,250 posts
 
I suspect that excellent sound can be achieved with either auto or manual bias, given the superb tube amps available in both categories.Certainly auto bias has`nt been detrimental as implemented in my 300b SET amplifier.
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