This is a vintage 1975 MXR (script logo) Phase 90 phaser pedal. Since its introduction in the early seventies, the MXR Phase 90 has always been regarded as one of the classic analog phaser pedals and has been used by greats like Jimmy Page and Eddie Van Halen. This particular example is in nice vintage condition and perfect working condition.
This early script logo variety is in nice original condition. While it is not the earliest BUD box version, it does feature both a script logo MXR box and matching bottom plate.
From the slowly shifting tonality at one extreme to the fast bubbling at the other, this is organic phasing that seems an integral part of the guitar sound rather than something slapped on top of it. Eddie Van Halen used these on his solos for the treble boost quality of the Phase 90, and a slight tonal shift in that direction as part of the effect is apparent when kicking the pedal in, but it’s the silky quality of the phasing that is the real deal here. It can nicely replicate simple UniVibe sounds rather easily, and is actually quite versatile for a one-knob effects pedal.
Cosmetically this pedal looks vintage, but in all the right ways, as all the legitimate wear gives it a great vintage mojo. On the bottom right side of the pedal, a slight groove has been added to allow the wire for the battery terminal adapter to be squeezed through for use with an AC power adapter.