there are 2 versions of the .22 caliber mesa with different output tubes... also, some have graphic EQ and some don't. The Graphic EQ is lame on this low wattage amp. You are not going to use it to cover 'master of puppets.' That said, both versions of this amp that I've used extensively dish out a nice Deluxe Reverb clean sound and a classic, early mesa lead as popularized by Santana. Many complain that its hard to match the levels of the clean and dirt channels for rhythm, but this amp was not designed for that. the idea was to have a vintage fender clean-to-crunch and then a big, boosted and loud 70s mesa solo tone. It accomplishes this goal while delivering Mesa's best clean tone in their whole history. I dock these little mesa combos a star because they are notoriously unreliable.