This British classic comes from the golden era of rock in the late 1960s. Known as the "plexi" era in Marshall terms, this period is distinguished by the iconic plexiglass front and back panels, which were later replaced with metal in the '70s. The circuit design is simple yet elegant, with the 1986 "Bass" specs mirroring the JTM45 on the preamp side, with the updated JMP power section (EL34 tubes and solid-state rectifier).
This particular amp remains in stock condition for the preamp, with the electrolytic caps replaced, meaning it’s had its 100k-mile maintenance and is ready for playing, gigging, or recording. A trimmer pot was added for fine-tuning the bias section. Additionally, 1k/5w screen grid resistors were installed—an essential upgrade in high-voltage amps to ensure optimal sound and operation, as any technician would attest. In simpler terms, it’s ready to rock!