Two Electrovoice Circlotron A-20-C Tube Monoblock Amps. These have been fully recalled. The can caps were carefully testified. The only modification done was to have the ability to bypass the preamp controls and use an external preamp by simply plugging into the Rec. Out jack. If you want to use thee as power amps only with your own preamp, simply plug into the rec. out rca jack. If not you can use this as integrated amps with the built in preamp and phono sections. These were teste...d as making 24 watts at under 1% THD with a flat response from 20hz to 20khz. All tubes are NOS. Due to age I do not accept returns but please let me know if you have any other questions at all. I will pack these very carefully in separate boxes.