We have a lot of experience with the Carver M1.0. It’s one of my favorite ampliefers. Dramatically underrated at 200 watts per channel; typically it delivers 400 watts. Built in Asia, it has a good build quality with very low noise and low distortion, especially compared to the previous model, the 1.5. The 1.0 and later models like the TFM-42 and -45 have minor problems, and we know all about them. We will be happy to repair yours.