These were done a Madter Electrician Audiophile,we changed the original ground rod for they had used brass and it rotted the 2 Solid copper pipe I had Heavy silver plated to not rot , same ground as original but much better
my system sounds night and day better , that’s the only thing that counts.
and I have at the breaker box a $300 Siemens surge protector which pikes up even little spikes . I had a dedicated 15 amp breaker before , even with a $5000 innuos streamer , in this new Dedicated 30 amp breaker4 wire sounds better then with the streamer vs my little green computer , it’s That good !