If you are looking at this listing you are probably aware of this amplifier. This is a Sanyo Plus Series amplifier model # P55. It is rough cosmetically but is is in working order. Rated @ 100 watts x 2 8ohms, 200 watts x 1 8 ohms. I tested this amp with program material and speakers. All the output level lights work. I am the original owner. I purchased this unit in 1978. I used it in the early 80s as the high end amp of a bi-amped disco speaker system and it never failed. This is a heavy amp weighing in at approximately 28lbs. I no longer can find the rack handles. I have the matching preamp in another listing. In its day this was one fine piece of electronics. Note: it is missing the power knob.