Mantle Fuzz (MXR Blue Box) voltages PedalPCB Community Forum Kiwi Flavored Disposable Vape First released in 1974, the MXR Blue Box Fuzz is one of MXRs foundational offerings alongside the Phase 90, Dyna Comp Compressor, and Distortion+. The Blue Box Fuzz takes your signal and duplicates MXR Blue Box from 1974 Today's offering is a spruced up reposting of a vintage 1976 MXR Blue Box rescue. These are VERY odd pedals. On one side is a double octave down effect, and on the other