I have just upgraded my system and am selling this Pre-amp. Its in great condition except for the small dent on the top of the unit's cover. I bought it that way and it has work fine ever since! I sent the unit back to Classe in 2014 and had the RCA jacks and volume encoder replaced. They told me that I had not cycled the power enough on the unit and allowed it to build up a static charge thus creating a problem with the volume control. The unit was return and has been working flawlessly since.