Today I downloaded the owners manual and I like Peavey's sense of humor. It has a picture of the amps control panel followed by a description of what each item/knob does.

The input jack's explanation:
"If you are having trouble figuring out what this is then please put the amp back in the box and get some drumsticks.*"

-at the bottom of page-
"*No drummers were harmed in the making of this manual"