I've been a GK user for most of my playing life and am now using a 3 Pro. I'd love some tips on getting a great funk or rock tone from this head. Does everyone use the tube gain on full? What boost buttons do you use for slap or fingerstyle? Any EQ secrets? What frequency do you prefer for best sounds? How do you push out the classic Ampeg growl tone? The head sounds great generally. I'm just interested in maximising the effect it has in different rooms when I'm on tour. I use active and passive basses so all ideas are appreciated.