i have tried probably 10 powercords....ditto rcas... headfone cables..over the last few years..
i treat them as "tuners" to finetune gears that i already LIKED/or bought
( same idea as swapping earpads..tubes...u get varying results..)
Is it worth buying ( or making them ), is subj to your wallet n perceived value...v personal.
And if i dun try it out...listen to it...i wont know if a particular item works on MY setup.
At times, a certain combo of cables or tubes would suddenly yield exceptional improvement...synergy? as if a bottleneck somewhere is unclogged.. v interesting hobby this is.
some folks cant "hear the diff" in some stuff they tried...
probably their setup is maxxed out and cant be improved further..
or some physical nature of their makeup they just cant detect the diff...watever the reason, it is good for their wallet.
For those who could hear a diff...it is a curse of sorts$$...lolz
( ok dun shoot me....thanks )