Who makes the best copper cables?

For RCA interconnects, I have tried a few different copper cables: Audio Envy, Morrow, Blue Jeans, Audio Note Lexus and Sternklang Ephemera.  I have liked the Audio Notes and the Ephemeras best.  I am using the Ephemeras now and they are keepers. They were the most organic and musical with good detail.  I will say for phono cables, the Ephemeras are not shielded and did not work well coming from SUT to integrated amp, too much hum.

For an Spdi/f input, the Ephemeras i liked better than Audio Note Lexus.  For an XLR input, Audio Note Isis cables. I liked them better than Wire World (I think they were Eclipse 8).

For speaker cables with bi-wired terminals, the biwiring sounds better to me than single cables + jumpers.  In that setting, biwired Mogami W3104 (from Performance Audio) and Audio Note Lexus are my favorites for my Audio Note AN-E SPe HE. I was actually flabbergasted by how good the Mogami was.  I had purchased them just to try biwiring and because they are relatively inexpensive. The bass is notably better and the detail retrieval is better. For my Pure Audio Project speakers with 2 terminal, the Ephemeras are my favorite. They are just very musical sounding.

@bthrb4u 

Who makes the best copper cables?
 

Police officers. They can be banked on to give you a good run for the money.

You’ll never take me alive copper! 

I agree with Pwoodard and one other contributor who recommended Audio Note and Mogami. Audio Note cables are undeniably pricey, but I love their sound and consider their quality to be top notch. Mogami is also surprisingly good considering their price, but to me, not quite as refined as AN. 

@mylogic  that is hilarious seeing that snake river audio is a retired cop out of California. https://snakeriveraudio.com/index.php?main_page=index