Fisher 80 AZ Mono Block Tube Amplifier Power Monitor, 8 Or 16 Impedance. This was found in the attic of an old estate, it was dry where it was stored, I have not tested this item at all, sold as is.Please review photos carefully for your own observations. As you can see in the photos it is missing one small Philips screw on the brass plate on the front. As well as the level adjustment knob.Thank you for looking!On Oct-28-19 at 18:36:47 PDT, seller added the following information:Please... see lady photos just added!! I was able to find the original manual to go with it and it has been added to the auction! Thanks for looking!