Yamaha P2100 Professional Series Natural Sound Power Amplifier 1980s. I did a quick test everything seems to work. One of the speaker's terminals is broken as you see in the pictures, and has a wire attached that works fine. I opened the unit to see how hard it was to replace but it requires soldering which is something that I don't do.
I will provide a replacement an exact one (used one not new) maybe you want to replace it. The metal case in One corner has some damage it was bent I tried to stretch it out a little bit that is just the outside nothing on the inside got damaged as you can see. This unit is a beast look at the Zise transformer and capacitor this Amp is heavy. There are some scuffs and scratches scattered about. It will come exactly as shown. Please see all pictures and use the zoom feature. Often the pictures describe the item better than words.