I'm on a budget so I did the following to clean up the power for my analog and digital front end.
I replaced the Leviton wall outlet with a Porter Port receptacle. During that install I cleaned the Romex wires and outlet screws with DeOxit. From there I plugged a Topaz 1 KVa Isolation Transformer into the Porter Port. I also changed the outlet in the Isolation Transformer to a Port Port outlet. I then plugged in a Belkin noise isolator strip into the Topaz. From there I plugged in all my gear. CDP player, preamp, Turntable. Sound wise I believe all this made the music in my system even more revealing. Also I took an Enacom AC filter and plugged that into the Porter Port wall outlet.