I´ve been trying to match the G12 Century Vintage with the 2203KK and my major, but it sounds very funky. really weird! It sounds totally muffled, like there was a pillow in front of the amp. I´ve tried different eq settings, but nothing seems to work. with the 5150III it sounds amazing, with the engl... kind of weird too. Also, with 1x12s the sound is amazing.