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Hello List, I recently purchased a cheap tube pre-amp by Art for my autoharp. I couldn't believe because it seemed to sound as good as if not better then my Presonus pre-amp (which has no tube). Now, i have heard it to be widely accepted that many prefer tubes because they create a warmer sound. So i read a bit to see if i could understand why? I think in my most basic primitive grasp of the concept "tube" that the benefits are due to tube circuitry whereby a small distortion spectrum results which causes added harmonics???????<--am i on track???? But, as read further i learned that the main benefit comes from DH-Set "SE" configurations and that the "PP (push-pull)" configurations do substantially less of this "warming effect"???? so, i am wondering then, do all current technology tubes sound better/warmer then non-tube preamps? or are there only certain tubes that do this? how would i know technically (besides listening) if i have a SE tube or a PP tube from specs in my manual that read "Tube Type: 12AX7A hand selected"? I am just trying to decode this mystery so i don't dogmatically accept audio theory without knowing why. Any and all input would be great! THANKS IN ADVANCE FOR YOUR TIME! :-) Margaret Noble Audio Artist http://www.myspace.com/margaretnoble __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com