The team my head Peavey 6505 + original.
I do not really have points of comparison, but it possde a gain equivalent Sovtek 6L6 WXT the +, another very 6L6 employed in many amps.
It does the job well, the sound is right, no noise, good dynamics, it is not too hot (Santana is fan!).
Very good amplification lamp (Chinese and sorts by Ruby) a price after all very honest.
I might be other things to say when I have changed these lamps by others (JJ / Tesla, Tung-Sol, Svetlana, EH etc.). In immdiat, is done!