I will tell you now I know very little when it comes to amps, I build guitars (basses actually) and that is we're my focus has been. I wanted to know if anyone has any insight on this amp and if it is possible to make it a more high gain amp? I like the sound of amps like the 6505, Revv or Orange Dark terror. If I changed tubes would this give this type of response or is it something completely different, that gives the amp that kind of tone. Those amps appeal to me because they have a lot of gain but the tone seems to stay articulate. This amp in its current stock form does ok but you have to crank the volume way up to make it sound decent. Not sure if this is every tube amp or not, so bare with me. I have had this amp since it came out even though I am a bass player but just this year I picked up a metal style 7 string Jackson guitar and I have fallen in love with it. I really like the tone and wide frequency range it can cover but want more from my amp. Let me know what you think and if you all think I should get something else because this amp will not achieve my goals that is ok as well. Thanks in advance!