Hi, I've got a question for svt2-pro owners. Today i've started to play with my svt2-pro...Everyone use this head know the sound and the power of this amplifier, so I say only...awesome!! The bias setting in the manual say: if the green led si on, and then the red, is all ok. My head have this led situation. When I turn on the head, green led is on, and red is off, but when I play on the strings, red led go on, and is off only when the amplifier stay on the on position, without playng. Is normal? Red led must light when I play on the strings and should be off when I don't play? thank you!