MXR M-101 Phase 90

The MXR Phase 90 was a phaser pedal used by both Sting and Andy Summers.

Sting's MXR Phase 90
Sting had used the MXR Phase 90 phaser for effects on his bass. The MXR first appeared in his rig around Spring 1979 on the Outlandos D'Amour tour, and has used it on tours for Reggatta De Blanc, Zenyatta Mondatta and Ghost In The Machine. Sting owned two MXR Phase 90 pedals, both of which were often seen together onstage on the Reggatta De Blanc tour, but he's often seen with one.

Sting's MXR Phase 90 was a late 1970s model (1978/79) with an MXR rubber knob cover over the plastic knob.

The MXR Phase 90 can be heard on Sting's bass in footage of the band improvising on "Canary In A Coalmine", featured in the Around The World film. Sting stated in an interview that the MXR Phase 90 sounded much better on the fretless bass than the Cry Baby, as there was no fret rattling.

Andy Summers' MXR Phase 90
In the early days of The Police, Andy had a Fender Twin Reverb amp and an MXR Phase 90. Andy Summers eventually had the Phase 90 embedded in his Pete Cornish custom FX board.