I got my hands on three ALTO MAC 2.2 amps for free. They are all broken in same way. When they are powered they start making this sound which I can only describe as a kind of surring noise. Otherwise they seem to work normally. I'm pretty sure it's caused by broken cooling fans. Has anyone got any experience with these amps? If you know how to replace/fix the fans or have the same issue please tell me I don't want to open them without knowing what i'm about to do.
Also, I don't have anything that can manage this much power, so I think I will sell them if i can fix them. How much do you audiophiles think they are worth?
Marantz DV 9600 Oppo BD-83 Marantz AV 8003 Quad current dumping amps X 7 Direct TV HD 20 HD DVR Carter audio workstation RME Fireface 800 Fujitsu 50XHA40 Front left and right Carter dual transmission line studio monitors MK II. Center Carter coaxial transmission line center speaker Rear Carter NFM-1s Center backs Carter dual transmission line studio monitors MK I. My system: - http://mdcarter.smugmug.com/gallery/...27077317_Pufg7