Gravity is the ultimate showcase of Mayer's dynamic touch on a Stratocaster. The tone is remarkably clean -- almost no overdrive from the amp, just the pure sound of a great Strat through a boutique Two Rock amplifier. Every nuance of pick attack, finger pressure, and volume knob adjustment is audible. The Klon Centaur is always on but set extremely low, adding just a touch of harmonic richness and compression.