It is so awesome to see all the discussions stepping up. I had previously used amplifiers with the 500 watt/ch Ncore modules, and a few other large Class D amps. Generally, they were great-but I found a whole new level of satisfaction when I jumped to Atma-Sphere amplification on my U-1s. I don’t think you can go wrong with them, and the MA-1s did a surprisingly good job on my U-1 with the PX panels and Consummate backplate.