A history question. AFAIK, Leo Fender was mostly a Country music fan, and as his amps progressed through the Tweed, Brownface, and Blackface eras, the emphasis was mainly on being cleaner and "HiFi". When Dick Dale came into the mix, the emphasis changed slightly into being LOUDER but still clean. Likewise, across the pond, Jim Marshall was taking Fender designs and making them bigger and louder. A separate head for an enclosed cabinet with an unprecedented 4x12 arrangement. And like Leo had Dick Dale, Jim had Pete Townsend encouraging him to make it LOUDER. Along comes Jimi and the JTM45 becomes 100 watts. Marshall eventually did a 200watt amp too. Fender was making the 180w (but clean) Super Twin in the 70's. Even the Ampeg V4's of the 70's were LOUD but still relatively clean. So when did amp manufacturers wake up and realize that it was the distortion and not neccessarily an endless chase to be louder that guitarists were seeking? I'm thinking of 2 events: 1. The introduction of Master Volumes: this was an acknowledgement that players wanted preamp OD while being able to trim overall volume. (when were MV's first introduced?) 2. Mesa/Boogie: this was essentially the first boutique amp maker, modding Fender Princeton's into using cascading stages and a relatively tiny amp compared to the big, visually-impressive arena stacks. What else? Any other comments?