I'm thinking that maybe I could have two amplifiers live (one clean, one dirty). But how should I do the dirty channel? I'm thinking of two options. a) Boost the gain b) Connect a ProCo RAT and bass EQ The first option could be good, because a lot of the time, the best distortion comes from the amplifier. But I've also got a nasty feeling (especially in the case of a valve amp) that this could shorten the amp's lifespan. The second option would probably be good too. Justin Chancellor does it. He's cool.