Any real difference in RCA cables quality for sub?

Has anyone actually done listening tests? I am just hearing mostly spitballing here. I have not, but always wondered. I always bought something cheap from a real audio company just to be careful. After hundreds of hours of comparing interconnects and speaker cables and noting such profound differences, I was tired and never found the time to do systematic tests. ... so would just hedge my bets. I’d really like to hear if someone with high end audio skill and experience has done some serious work.

@millercarbon Good to hear... this has always made sense to me... but so frequently the differences I hear do not make sense. For instance, I just switched the power cord on my Aurender W20SE from a Shunyatta Venom 14 D to a Cardas Clear Beyond and it produced a noticable improvement in bass and detail... the Aurender audio circuits run on battery power to avoid line current... it just plain shouldn’t matter. So for fun, I switched to a WireWorld Silver Electra 7... harsh... You just have to listen.

Well, it would not be the first time something in high end audio defied my intuition. i remember my first digital interconnect... 1989?... it couldn’t possibly effect the sound, but the largest difference I ever heard. I long ago gave up, and just try it. How about this... the shielding is actually protecting nearby digital interconnects that are actually downstream from the streamer from the power cords magnetic field? Or... who knows what else. It is not day and night, but is noticable.