Improve your Sky HD box for £40
Or the subject line could be any other piece of equipment.....but absolutly no explanation again as to why this is the case just a list of power cords that we might like to buy and their possible merits.
Obviously the improvement is dependant on many elements of power supply (we don't all benefit from the perfectly clean supply that is in the What HiFi offices) a few things that spring to mind before you spend £150 and recieve absolutly no benefit.
1. The quality of mains power supply to your home, many of us do not get 100% especially if you are out in the country.
2. The quality of the ring main in your home, £150 per meter cable plugged into a £2,50 per meter ring main cable, you do the maths
3. The quality of the wall socket
4. The quality of the multisocket power block that you use; rarely does anyone have 6 or more mains wall sockets behind their AV system
I could go on and on and on, but you get the point