The MXR Phase 90 is a bona fide legend in the effects pedal game, a practically ubiquitous piece of gear among guitarists of all generations. That said, this classic phaser pedal comes in a number of variations, each with its own unique features and flavors. Be sure to watch until the end as Sweetwater‘s Don Carr puts a selection of these phenomenal phasers through their paces in an effort to demonstrate what makes each so special.