- James Hetfield (Metallica), who relied on the JC-120’s clean channel for shimmering arpeggios on tracks like “Fade to Black” and Master of Puppets.
- Joe Walsh (The Eagles), whose JC-120 shaped the clean, melodic leads in songs like “Hotel California.”
- Robert Smith (The Cure), who used the JC-120’s stereo chorus for the jangly, atmospheric textures of albums like Disintegration.