I use a single Enacom line filter. It makes a very useful difference in clarity at the top end. This is noticeable either with my main system or with my budget bedroom system.
I'm told that adding another Enacom will extend the improvement down near the upper midrange, so I'm considering that. However I first want to try a mod to the AC outlet. This is the one Chris ven Haus suggests (and sells the parts for) on his Web site: "TWO .47 uF 600V Auricaps in parallel with the red lead to the hot screw and the black lead to the neutral screw".
He charges $18.99 each for these caps at his site.
http://www.venhaus1.com/VH_Audio_Test.html
I'm told that adding another Enacom will extend the improvement down near the upper midrange, so I'm considering that. However I first want to try a mod to the AC outlet. This is the one Chris ven Haus suggests (and sells the parts for) on his Web site: "TWO .47 uF 600V Auricaps in parallel with the red lead to the hot screw and the black lead to the neutral screw".
He charges $18.99 each for these caps at his site.
http://www.venhaus1.com/VH_Audio_Test.html