Roland's classic guitar amplifier, the JC-77. While the JC-120 is a studio standard, I purchased a used JC-77 with the same features for home use and due to storage space considerations. The Jazz Chorus is a representative solid-state (transistor) amplifier, and I thought the JC-77 was rarer and better than the more common JC-120. I believe the sound is the same as the JC-120 except for the size and output, and 40W + 40W is sufficient. There are scratches and dirt, but there are no problems with the sound. Please check the condition in the photos. The JC Jazz Chorus series was born in 1975. Its unique "JC clean" sound and "spatial synthesis chorus" have been loved by numerous historical artists. The secret lies in its unique design and structure, which are specialized for a clean sound unlike any other. This unit, the "JC-77," was released in 1984. It's a mid-class JC with 80W output and two 10-inch speakers. - Model Name: Jazz Chorus-77 - Brand: Roland - Function: Chorus function included - Power Switch: ON/OFF switch - Number of Knobs: 6 knobs (volume, depth, chorus, etc.) Thank you for viewing.