Davis S,
Amp - My Parasound has adjustible gains. Reduced them by 25% and hiss was greatly reduced. In dead silent room (night)/at +10 volumn/analog source selected nothing playing/hiss heard from < than 1 foot.
I also use Parasound amps. Did you know that when you reduce the gain control on thje amp you may actually be reducing the Class A output % of the amp?
The reason I like the Parasound is because of the high Class A bias and high current. Because of this I run the level controls at full output for the full Class A bias benefit (Class A is said to be smoother output).