The MKS-70 Super JX is the rackmount version of the JX-10 synth, a 76-note hybrid analog synth released in 1985. The JX was the last high-profile analog synthesizer produced by Roland before embracing digital technology with the D-50. Although the DCO based MKS-70 does not sound as thick as the VCO based MKS-80 Super Jupiter, it is still a very capable, often underrated synth with extremely stable tuning.