Vh audio has cryoed wire
And analysis plushas very good awg wire
Shielded is not as important
I have a 4 wire setup a common ground
And a insulated isolated ground on its own buzz bar to the outside
Everyday is the same No noise no sharing ground with other appliances
My Audiophile friend electrician taught me this and breakers are silver over copper
From Germany this ovoids the copper from oxydizing