Since the arrival of the Sasha 2/WATCH Dog system, there hasn’t been a visitor from within the industry or reviewing community —or more tellingly, one with no audiophile pretensions at all—who hasn’t been instantly sucked into the musical performance on offer. Everybody gets this system. They get what it’s doing and why what it’s doing is special and worthwhile. It’s an object lesson in just what an audio system—especially a high-end audio system—should do. It’s musically coherent and capable of intimacy and delicacy, real power and scale. It is both honest and communicative. But above and beyond all that, it’s fun and engaging—and occasionally frightening, shocking and not a little scary. It’s all the things that real music is…