Practically Brand New Roland JC-40 Jazz chorus amp. The Roland JC-40 Jazz Chorus Guitar Amplifier is a high-quality amplifier designed for performance settings, featuring two speakers and solid-state technology for clear and powerful sound. Made in Japan, this 40W combo amplifier is suitable for electric guitar players looking for a versatile and reliable option for their gigs. With its classic Jazz Chorus model and 8 Ohms impedance, the JC-40 delivers a warm and responsive tone that is perfect for jazz and blues musicians.