Houses two independent 60W power amplifiers.
Here's a simplified JC-120 schematic diagram: jc-120 schematic
Some pics that display cosmetic differences of JC-120's of different pedigrees: From top to bottom. - Very old version of the amp: Solid State Guitar Amp Forum Roland - JC-120 | Jazz Chorus Guitar Amplifier Houses two independent 60W power amplifiers
While modern modeling amplifiers can approximate the JC-120’s sound, the original schematic reveals why the amp behaves the way it does. Unlike tube amplifiers, which rely on output transformer interaction, the JC-120 is a fully discrete, dual-channel solid-state design. Studying the schematic shows you: which rely on output transformer interaction
The JC-120's circuit is split into two distinct channels: and Effect .