The Duellist pedal from King Tone Guitar is a two-in-one overdrive pedal that combines the circuits of two classics of the genre: the TS808 Tube Screamer and BluesBreaker. Each side offers controls for Drive, Volume, and Tone, along with a distinct variable Fat, Stock, and Glass settings. Engaging and combining these two effects opens a massive realm of different overdrive tones to explore and tweak.