Screen or not to screen?

Hi, Im working on make myself a power cord/cabel. Using Furutech F-11 Cu contacts. What is the recomended, screen or no screen? I have experance that when going from screened ( just conected in the wall conector ) to non screened and the sound got sharper, wider and more tight bass. Is it an illution and screen will always be better? Frank
 
My take is just get a regular mains cable and don't waste money on unnecessary nonsense. That money is more usefully spent on speakers and room-acoustics.

If you have mains hum pickup and cannot route signal cables away from mains cables, that's the time to try a shielded mains cable I'd have thought, although quality screened signal cables should be doing their job, and balanced interconnects may fix the problem.
 
Ditto , I have made these up for customers to their instructions with them supplying the parts, and frankly it’s a load of old cobblers, but who am I to argue when they’re paying. I don’t sell this shizzle, so I’m not exactly encouraging it lol.

Copper’s copper , this is on the mains side too

You’d be better spending the money elsewhere in your system