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Electro-Harmonix Nano Big Muff
Features
Wide-ranging distortion/fuzz effect for electric guitar or bass
Tone control lets you sweep from warm, wooly rhythm tones to biting lead tone
Sustain control enhances harmonic distortion as well as sustain
Favored by players such as Jimi Hendrix, Santana, David Gilmour, and countless others
A staple of rock music since the 1970s