Rich Wilson wrote:

If you're going to upgrade your power cable you really ought to do it
all the way back to the substation, otherwise it's a bit pointless...

Well that was my initial thought... but apparently not.

In a conversation I had with a friend, we determined that power cables
are good at carrying low frequencies, and poor at carrying higher
frequencies. So RFI picked up at the substation won't make it to your
house, but interference sources in your house will cause RFI to reach
your kit.

For the record, at the moment my hi-fi equipment is plugged into a surge
protected 4-way strip, nothing more elaborate.

--
Glenn Richards Tel: (01453) 845735
Squirrel Solutions http://www.squirrelsolutions.co.uk/

IT consultancy, hardware and software support, broadband installation