All 3 Krell pieces in main pic are for sale in different ads. This is the ever reliable amp which doubles from 250 to 500 watts at 4 ohms. Rated a 7/10 for the slight discoloration on the top surface. I bought it this way from the former owner. It does not effect the sound quality. II have an identical set of these at another location. No longer need 2. Have been playing these with Martin Logan Summits and Maggie 3.6's. Sounds wonderful.