This Pioneer SA-9100 stereo amplifier is a vintage piece of equipment that requires repair and is sold as is. The protection light is currently on and the item is being sold for parts or repair. I listed this amp earlier and it was working but I got it back out to make a video for a buyer to let them hear it playing. While doing this the protection light came on. I unplugged the amp and applied power again and shortly after the protection light came on again. I tried unplugging the amp to reset the relay again but the protection light is just on now the relay will not reset. I've checked everything internally to see if anything looks blown or burnt and there's no visible signs of any damage. I then researched the problem and it seems to be an ongoing problem with these amps which are easily repaired. For around 200 dollars a complete re-cap and relay replacement can be done. This is still a great looking amp inside and out and for the price plus repairs it's still a great deal. Made in Japan, this integrated amplifier is a great addition to any vintage audio collection. Again this is a as is sale so make sure you look at all the pictures and ask any questions before you purchase I will be happy to answer them for you.