Interconnects and non-believers

This morning I was exploring SVS Sub interconnects. I was referred to their Soundpath shielded sub cable. One reviewer wrote this candid comment:

“I was using coat hangers for speaker wires before (just kidding), what a difference these cables made to my sound system. I can hear instruments and voices that where not audible before. I’am very pleased with the quality and performance from these cables. Highly recommended.“

https://www.svsound.com/products/soundpath-rca-audio-interconnect-cable

@johnread57I note the statement that the cable was directional. Directional only because one end was earthed at the source end thus grounding EMI and RF. I note some poster's claim all wire cable is directional, but I still do not understand why...

I want to be a believer as I want the best sound I have Para A23 NAD51 Bryston Pii I have interchanged Audioquest Cinnamon Coffee and Diamond USB bbetween Bryston and NAD There has been zero difference in the sound wuality between the three cables The Coffee made the sound louder I have also ugged in a RS Dimitri with Shyunta Zitron Python again no difference in sound whether plugged in wall or Dimitri What could posdibly be wrong with this I had someone else listen as well and they didnt hear any diffetence

I used to love my big V8s too.  E39 M5, Corvette Z06.  Then I bought a 911 and man is that whole chassis and flat 6 fun.

As for the EE degrees, I have one and I had a coworker who was a signals guy (Intel) who swore cables would make no difference in a stereo.  I had three different options and after switching between them, he conceded that all three were much different.

I do not understand the few people who claim they make no difference.

As for the statement that cables can only transmit a signal without changing it, I suggest that is only partially true.  You are still transmitting from one driver network to one receiving network and the cable (impedance, inductance, etc) will affect how that signal is transmitted.  But yeah, the whole point is to create a system where you like the sound and enjoy listening to it.  

I am buying an awesome amp tomorrow and probably a PS Audio Stellar GCD DAC/Pre next week.  Then I have a problem because I don’t have any XLR cables at the house because I’ve never had a balanced pre-amp before.  This will be interesting.