The Mooer Hustle Drive Guitar Effects Pedal has an ultra-wide dynamic range and an extraordinary open tube-like drive sound. The Hustle Drive has two modes. The HP or high peak mode, boosts up the bottom-end, when increasing distortion by Drive knob, you will get more volume and a slight increase in high-mid range (around 3.5 KHz). The LP or low peak mode, adds very little color to the original sound, very nice for clean boosting.