15-Jul-2014, 18:42
(This post was last modified: 15-Jul-2014, 18:44 by Rufus McDufus.)
(15-Jul-2014, 14:34)PeterS Wrote: Does anyone have experience parallel fliters? The type of filters that you plug into a power socket and which suppresses higher harmonics. They are made by for example Nordost or Kemp Electroniks.
I have some Blue Circle Audio Sillycone passive filters (http://www.bluecircle.com/page26.html) that plug in alongside the plug of the device you want filtering. They're like the Kemp or Russ Andrew wall-wart ones but on steroids and full of large capacitors. They look a bit like pipe bombs, and took a suspiciously long time shipping from Canada possibly due to this. They kill any measured noise coming back from the Devialet onto the mains dead. Having said that I can't really hear any difference! I do have the Devialet on a different mains circuit though so perhaps that's enough anyway.
I've got an Entreq CleanUs which also plugs in in parallel. This filters the neutral and earth and does seem to enhance things.
I don't really trust inline filtering even though they filter more types of noise (common mode in addition to differential mode). The reason for this is I've not heard one yet that made a positive difference, though I'm sure there are some. It also depends on your electricity supply and I don't think I really have many noise issues anyway.
