James, this is a mains plugtop that can accept up to four mains cables. Years ago I bought a couple, they work as mains plugtops but there is no way they could 'improve' the electricity supply to equipment. It is possible that I still have one in the garage, if so anyone here can have it for free. A bottle of Midleton whiskey and I will deliver it in person......
Agreed ..
I gave two links to tnt-audio.com
one was a DIY mains cable; the other a replacement for a distribution block [it has no on/off switch, no light and the signal paths are short]
james