The primary preamp and power amp circuit layouts.
Before diving into components, it is vital to understand the design philosophy. In 1975, Roland aimed to create an amplifier with zero distortion, maximum headroom, and a distinct vibrato/chorus effect. Tube amps naturally compress and break up; the JC-120 was designed not to. This necessitates a high-voltage, high-current design that differs significantly from the typical stompbox circuit.
The Roland JC-120 Jazz Chorus Go to product viewer dialog for this item.
Jc-120 Schematic Jun 2026
The primary preamp and power amp circuit layouts.
Before diving into components, it is vital to understand the design philosophy. In 1975, Roland aimed to create an amplifier with zero distortion, maximum headroom, and a distinct vibrato/chorus effect. Tube amps naturally compress and break up; the JC-120 was designed not to. This necessitates a high-voltage, high-current design that differs significantly from the typical stompbox circuit. jc-120 schematic
The Roland JC-120 Jazz Chorus Go to product viewer dialog for this item. The primary preamp and power amp circuit layouts