This is a MKII that the previous owner had modified to increase wattage, and to remove power scaling (!) and replace it with a cathode/fixed bias switch. Played in a smallish bar with a 1x12 Avatar cab with scumback. Bottom line--sounded awesome. Very, very happy with the amp. Very versatile. Great cleans. Takes pedals well. My bandmates all told me that it was the best I've ever sounded. Very happy with this little bugger. Only thing I could wish for is a footswitch to switch between decade modes.