I received the amp new last week. At medium volumes this amp is very resolving and transparent. I like how it sounds. It is doing many things right. But at idle or low volumes a background hiss is quite obvious. It is independent of the volume of the pre-amp (MCP-18). It is also there when I disconnect all inputs. This plugs into a Belkin PF60. I tried directly into the wall as well. That background hiss is always there. Easy to hear from 8’ away.
So alright, the amp’s 89 dB S/N ratio is not impressive, but surely it cannot be this audible? Is this normal or is my unit defective?