Classic Recording Studio Equipment

Vintage Digital

Roland SDD-320 Dimension D

Roland SDD-320 Dimension D Chorus

Roland's Chorus effect that featured heavily on their JC Series guitar amplifiers was a unique and desirable sound back in the late 1970s and early 1980s. The demand for this new chorus effect was so great, Roland developed the Roland SDD-320 Dimension D to satisfy that market demand, and it is quite possibly the greatest chorus effect processor ever made.

Roland SDD-320 Dimension D Chorus Details

Roland SDD-320 – Roland’s chorus had a huge impact on recorded music particularly in the early 1980s. It almost defined the clean guitar sound from the early 1980s and onward. Guitarists like Alan Murphy used The Roland SDD-320 Dimension D Chorus rather than pedals in the studio, and you can hear this on his recordings with artists such as Go West and Kate Bush.

The Roland SDD-320 Dimension D Chorus is a specially designed chorus effect unit for adding spatial effects to stereo and monaural sound sources.

Monaural inputs are converted from a single point sound source into a sound which fills the entire stereo field. The Dimension D gives a new dimension without the apparent movement of sound produced by most other chorus devices.


  • Both balanced and unbalanced inputs and outputs for ease of use in the studio or on the stage
  • Click-free noiseless switching between four different dimension modes.
  • Remote controlled dimension EFFECT/NORMAL function.
  • Fast acting LED level indicators,
  • Low noise (S/N greater than 95dB, “A” weighted).
  • Standard 19″ rack mount


The Dimension Mode selector button provide different effects, MODE 1 produces the softest effect and MODE 4 produces the strongest effect. At OFF the sound passes through the SDD-320 without change.


  • Input Level: +4dBm
  • Input Impedance: 26 kOhm
  • Frequency Response: Unknown
  • Dynamic Range: >95dB
  • Dimensions: 482mm x 92mm x 252mm
  • Weight: 4kg


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The details provided above are drawn from historical documents like advertising brochures or user manuals. They’re shared without bias or review. This info is given solely for your consideration, helping you gauge its usefulness to you.

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The Studio D Chorus plug-in for UAD-2 hardware and Apollo interfaces is an exacting emulation of this sought-after rack unit, deftly capturing its musical bucket-brigade circuit, the key to its complex range of sounds and textures.

Roland SDD-320 Dimension D Chorus Delivers

by Peter B

Sound Quality 100%
Build Quality 90%
Usefullness 100%
Mojo/Funk 90%
Reliability 80%

The Roland SDD-320 Dimension D Chorus is pure magic in a box. It’s one of those pieces of gear that never goes out of style. The lush, spatial sound it adds is simply brilliant. Whether you’re enhancing synths, guitars, or vocals, the Roland SDD-320 brings a new dimension to your sound.

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