this is a 300 watt at 4oms tube amp. I've yet to put new tubes in it since I got it. I have a friend who can do the work for me. Now all I need to know is what are some premo tubes i could put in it. I want a nice and deep grity growel out of it. Something that can still resemble something pretty when need be but for the most part really mean sounding. I have a Nemesis 8x10 cab and a MIA Fender Jazz Delux.