MXR
MXR, also known as MXR Innovations, was a manufacturer of guitar effects units, founded in 1972 by Michael Laiacona, Keith Barr, and Terry Sherwood, and based in Rochester, New York. MXR is now owned by Jim Dunlop. The first MXR effects pedal was the M-101 MXR Phase 90, widely used on the first two Van Halen albums. A milder version of the effect was also released, the MXR Phase 45, and a programmable version, the Phase 100.
