Thanks Mark. Yes I ordered a pair to see whether they were useful or not - I didnt have particularly high expectations after all they are only sockets lol (or so I thought).
I decided to undertake the requisite change on my NVO Spa II phono stage output. After installation I played familiar music and immediately noticed a much quieter noise floor. Actually so much so, that I turned up the volume more and couldn’t hear anything so thought it wasn’t on until music burst into the room. Strange since I didn’t see anything wrong with the existing plugs.
The sound was fuller in the mid bass with rich tone and lots of space. Bottom end hefty per Bocch mains plugs.
All in all a great little upgrade. I shall implement elsewhere.