OK I got my Girlfriend to buy this, she now has a better amp than I do, But as much as I've tried to find it on the net I can't seem to get a strait answer as too how I would increase It's distortion By way of replacing it's tubes with a different brand. I do believe it is stalk, it sounds great but even turing it up and kicking on my super overdrive in front of it that way doesn't sound right, it's heavy but strange and earsplitting like it's not compressed enough by its distortion which brings me to my question.

How do i get this thing to put out more distortion on it's own?


(I'd like to just have the overdrive pedal as a solo boost not on all the time)