Roland JC-120 (1975)
A stereo solid-state guitar amplifier renowned for introducing the world's first chorus effect.
Overview
The Roland JC-120 Jazz Chorus is a stereo solid-state guitar combo amplifier introduced in 1975. It became Roland’s legendary flagship, celebrated for its exceptionally clean sound and pioneering use of chorus. As the first amplifier to feature a built-in stereo chorus effect, it set a new standard for clarity and lush stereo modulation, earning its reputation as the king of clean tone. The model remains in production decades after its debut, a testament to its enduring design and influence.
Specifications
| Product type | Guitar Amplifier, stereo solid-state guitar combo amplifier |
| Production years | Introduced in 1975 |
| Rated Power Output | 120W (2 x 60W) |
| Speakers | 2 x 12-inch |
| Weight | 28 kg / 61.7 lbs |
| Dimensions (Width) | 760 mm / 29-15/16 inches |
| Number of Channels | 2 |
| Reverb | Yes |
| Connectors | CHANNEL-1 and CHANNEL-2 INPUT HIGH and LOW jacks (1/4-inch phone type) |
| Nominal Input Level | -30 dBu |
| Accessories | Vinyl Cover |
| Manufacturer Part Number | JC-120P |
Design
The JC-120 uses a solid-state amplifier design in a stereo combo configuration. It is best known for delivering a pristine clean sound and housing the world’s first chorus effect in an amplifier, contributing to its iconic stereo output and long-lasting appeal.
Context
Introduced in 1975, the JC-120 became a cornerstone of Roland’s amplifier lineup and is associated with the Jazz Chorus series. It has been described as the gold standard for clean amp tone and has remained in continuous production since its debut. A service manual exists covering both the JC-120 and JC-160 models.
Market
The JC-120 is known to suffer from broken input jacks, particularly the Channel 2 'High' input on units from the late 1970s to early 1980s, with repair discussions appearing in multiple forums. Replacement of low input jacks on early 1980s models has also been documented.
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