Roland SDD-320 Dimension D

The Roland SDD-320 Dimension D is a rack-mounted chorusing unit.

Andy Summers had a Dimension D as part of his set of rack units enclosed in the "Roland Rack Case" during the Zenyatta Mondatta and Ghost In The Machine tours. He likely used it to reproduce chorusing effects developed with the Roland JC-120 Jazz Chorus in the studio, although he also had the Electro-Harmonix Electric Mistress in his Pete Cornish custom FX board