Trying to make the Peavey valveking do metalcore

You should also try plugging a 1/8 to 1/4 adapter thing into the "1" input and plug the guitar into "2". It gives you a gain boost if memory serves.
 
Damn it, I'd never heard that, I'll have to tell my buddies who have valvekings to try it out

as far as i recall i was the person that came up with this and posted on UG back in the day or at least the first to say anything about it . a few people tried it and liked it but i think that no one kept the info afloat so it got lost with time