I’ll allow someone who is more senior (*higher number of posts on audiogon*) to answer that question.
Here’s my 2 cents so they can tell me I’m wrong.
Long story short, properly designed and terminated cables should not make a difference - They should not improve the sound quality of a system beyond what the electronics and the speakers or headphones themselves are capable of reproducing as audio output. The sum of what you’re listening to is the electronics and the driver movement of the speakers/woofers. The cables can only do wrong, they can’t improve what is.
Interconnects are like a bridge ---- really awful RCAs or balanced cables are like a semi-broken bridge. I wrote about why this happens with resolving systems, but I think the moderator deleted my post.
Power cords just need to be sufficient for the electrical load, and have enough shielding so stray noise from Wi-Fi/wireless signals does not infiltrate them, hence why I recommend using ferrite cores on either end of power cords, so 2 ferrite cores per power cord. It cleans up high frequency noise that often causes noise contamination in audio systems - in modern households - like smart-home functions for lighting, small speakers in the ceiling etc.
Yada Yada,.
