This is a little 40 wpc amp I picked up on Ebay to power my Overnight Sensations. It arrived in very good shape. All functions appear to work. The DC offset measured an acceptable 25 or 26 mV on all 4 outputs. That is a touch higher than ideal, but not something that needs immediate action. This model was produced from 1978 to 1980, which makes it about the same age as me. My plan is to add some mahogany panels on the sides, and to paint, or possibly powder coat, the black casing to a yet unchosen color. The inside could use a little cleaning, but it could have been a lot worse. I have seen electronics much younger than this with far worse interior conditions.