Thank you for viewing. This is a YAMAHA J-35 discrete circuit guitar amplifier for sale. It was found during a warehouse cleanup. It's probably a discrete amplifier made around 1977-78. Made in Japan, 1977-78 Voltage: 100V Frequency: 50/60Hz Power Consumption: 25W Output: 40 Watts Speaker: JA3059 30cm SN: 20531 Controls: VOLUME, BASS, TREBLE, BRIGHT, DISTORTION, REVERB Power-SW, INPUT JACK (HIGH, LOW), FOOT SW JACK (DISTORTION, REVERB) on the back, HEADPHONES SIZE: 500W x 450H x 200D (mm) I've only used the F series, so this is my first time with the J series, and I only realized it was a discrete circuit when I was adjusting it. There was a small amount of crackling, so I removed the crackling from each pot. (If crackling occurs, turning the knob around several times should remove it) I cleaned it and tightened the screws, completing the repair. Sound-wise, it seems to pair better with humbucking pickups than single-coil pickups, and it seems to suit a bluesy sound. Please feel free to ask any questions you may have, and I will answer them to the best of my knowledge.