Check the listing for details. Electro-Harmonix Bass Big Muff Pi Fuzz Distortion Guitar Effect Pedal. Condition: Used. Listed at 74.99 USD. Up for sale is a fantastic Electro-Harmonix Bass Big Muff Pi Fuzz Distortion Guitar Effect Pedal. This high-quality pedal is perfect for any bass guitarist looking to add some serious distortion and fuzz to their sound. With its analog design and powerful effects, this pedal is sure to take your playing to the next level. Featuring a range of different distortion, overdrive, and fuzz settings, this pedal is perfect for any style of music. Whether you're looking to add some crunch to your rock playing or some warmth to your jazz, this pedal is the perfect choice. So if you're looking for a great distortion pedal for your bass guitar, be sure to check out the Electro-Harmonix Bass Big Muff Pi Fuzz Distortion Guitar Effect Pedal today!