This is the Killing Floor from Seymour Duncan, a high gain boost pedal that can give you both a clean boost as well as a musical amp-like overdrive all in one pedal! Use it to boost your overall output for solos, to push an amp further into overdrive, or for a beefy, expressive solo tone. Its also great as an always on pedal for adding the finishing touch to your tone; its like an overall enhancer for your entire sound.The single control knob gives you up to a whopping 34 dB of additional gain for amazing range, from subtle boost to brash chords to a full, fat overdriven lead, while the 3-way Voicing toggle switch lets you sculpt your high end with a boost at 10K, a cut at 4.8K or a flat setting. Use this switch to take the bite out of overly bright single coils, put more sting into a dark humbucker or to add crystal clear, boutique-style airiness to your tone.