Unplated copper spades/banana

For what it’s worth, coming from Monoprice 12g wire with Nakamichi bananas, I went with the Viborg pure copper banana plugs on Furutech FS-A36 12g speaker cable. I tried one speaker with the Nakamichi & the other with the Viborg both treated with Stabilant & the Viborg & the OCC Copper made a HUGE difference. And I thought my system sounded good before the change.

@dougthebiker 

As I read all these posts, I can't help but wonder what the systems of the people posting are like.

I often wonder that too.  Mine is posted, as is yours, and it is nice to have that perspective about the system a poster is listening to, in order to help understand how they developed their viewpoint. 

Why do we need to have high skills to listen or enjoyed music?

twisting it to the Romex and using two wire nuts (not recommended and not approved by code!)

Hardwiring is code-compliant, you just need to provide an appropriate junction box. 

Using "two wire nuts", however, would be a code violation as it would leave one of the 3 conductors unconnected :)

Hardwiring individual components may not be ideally convenient, but it would seem appropriate for a power conditioning unit.

If you can find pure silver wire with pure silver connectors I would assume this would be the best conductivity of signal one could get.

https://tempoelectric.com/cables.htm