V1 Rumbles, Version 1 of the solid state Rumbles, produced from 2003 to 2010, had rubber corners, black furry sides, black metal grills, in 15-watt, 25-watt, 60-watt and 100-watt models. The 60 & 100 models shared 4 band active EQ that gave good tone. V2 Rumbles, Version 2 of the solid state Rumbles, produced from 2010 to 2014, had metal corners, black vinyl sides, black metal grills, in 15-watt, 30-watt, 75-watt, 150-watt and 350-watt models. The 75 and 150 models shared 4 band active EQ, while the 350 had a fully parametric mid-range. The 150 and 350 were the first D-class. And the 75, 150 & 350 shared a harmonically pleasing, blendable, and flexible, overdrive. V3 Rumbles, Version 3 of the solid state Rumbles, produced from 2014 and currently, have metal corners, black vinyl sides, and vintage-looking silver grill cloth, in 15-watt, 25-watt, 40-watt, 100-watt, 200-watt and 500-watt models. The 40 thru 500 models have bright, contour & overdrive voicing buttons with gain, drive & level controls, and the 4 band active EQ. The Stage 800 and Studio 40 Rumbles share only the metal corners, vinyl sides and grill cloth with the V3 Rumbles. It shares the digital modeling characteristics of the Mustang GT guitar amps. Although they include Rumble amp and cabinet modeling settings, these amps are nothing like the V1, V2 or V3 Rumbles. They are a quantum leap more advanced than previous Rumbles! Yet, they are named Rumbles. Therefore, should they not be called Version 4 (V4) Rumbles?