I am currently running the 202 amplifier for a monitor use, and using the 602 for the mains. The challenge I have is for the 202, the two power settings located on the front, the one side I run at maybe 30-50% and it sounds great, the other side I have to power to 100% to get any volume at all and even then its 70% less than the other side. I switched the cables around to verify it was an amp problem not a cord problem. So I am still miffed about what it could be. This unit is approximately 8 months old. Any input would be greatly appreciated.