I was recently trying our some of the new Rickenbacker, Shecter and Yamaha BB Series basses and a Fender Jazz. I just plugged into the nearest amp, it being a Fender Rumble 100. At first I thought well, these are pretty nice basses and all sounding good. I tried out some of the options on this rather small combo amp and was quite surprised how versatile it was. Impressed with the amp, there was a Rumble 200 next to it and that was that much more being 200 watts. I had my Gibson TBIV getting back from a setup and that sounded glorious on both as well. I remember the original Rumble series and not impressed. Could this new series have benefitted from the Genz Benz technology that Fender 'inherited'?