From MXR: Often imitated but never duplicated, the elusive vintage "script" Phase 90 is at the top of the list for pedal collector's world-wide. The original version—available from the company's inception to the late '70s—practically defined the classic phase shifter sound, and was heard on everything from hard rock, jazz-fusion, to funk hits. The MXR Custom Shop Script Phase 90 brings back the headroom and clarity of the original, along with its ultra warm and smooth phasing and reduced midrange swell. And it comes dressed in the original smooth orange paint job and script logo with an LED and AC power jack, direct from the MXR Custom Shop.