high-quality MK unswitched sockets have high-quality contacts within the socket with a larger surface area than cheaper sockets, ensuring excellent conductivity and current delivery
I agree with RSSTEVE.
Mk are a quality product and you will do no harm in replacing your old socket.
However i dont really understand what you are trying to achieve......what is the problem exactly?
A mains filter and a spike /surge filter together with a UPS are all great things but so is a top of the range BMW but you dont actually NEED one.
I have all sorts of protection on the IT at work but pretty minimal at home.
So what is it you are looking to do /achieve?
Unswitched sockets do not have the contacts required for the switch in the line of the mains supply. Over time, switches in a switched socket get a layer of carbon across their face caused by arcing when the switch is thrown. Instead of a solid conductor you get a semi conductor, introducing unwanted resistance and capacitance into your mains supply and degrading the current delivery capability of the socket
You are dead right you can only do good by replacing the socket.
Quality HI FI will often show things up that cheaper ones dont.
Going by what you say about your house wiring and me being an electrician.........I would be looking first of all at the quality of your earthing.
Also to use a non technical approach have you tried taking you entire kit round to a friends place and see if it hums there?
Not exactly a high tec approach but easy to do.
If I have a PME system, can I still put an earth rod in and earth my system components?
Any news ?
You get a second earth terminal on MK stuff because its quality.....