Haven't played a GK in years and no new MB's in town to demo Just used the power amp side of an old tiny 1x12 MB200 combo (100 watts) in to a 2x12 cabinet. Sounded really good when compared to a 7-Pro; different but really good. Also sounded like way more than 100 watts with a solid and firm bottom. Questions: Does the old MB combos sound like the RB series? Do either of these sound like an MB500? i.e. is the GK sound baked in and the main differences are power output? Bonus question: Does MB500 sounds more like the old MB200 combo than the Fusion?