The Joyo AC Tone JF-13 pedal reproduces the sound of a Vox AC30 amplifier--that classic British rock sound all guitarists dream about. It has sparkly high end, like the Top Boost model, and works on Drive to about 7 for subtle forms of overdive with harmonic overtones. Good for players who value a clean sound with a little warmth. It can also dirty up when drive is cranked hard to 9 or 10.