My Kismet amp in a Khartago case has been pretty awesome sounding although I could never get it absolutely silent and in my treated studio that is an issue. I think it may be partially due to the high sensitivity of the amp but can't be sure. I don't notice it on my main system but in a silent room a slight buzz from my speakers is barely audible. I had to go Pass Labs in order to find a "better" sounding amp. The XA30.8 has been a revelation. But also costs 3.5x as much as I paid. I'm selling my Kismet amp if interested
