It's just a hobby. All is good as long as it sounds good to you. I wanted the best the sound I could have so I looked at other options.
I feel I have the gear I want and like. Cables were the next step. I never thought they would make a difference.
I was wrong. This is my personal experience.
It does start with a good power source. As long as you have no artifacts or synch issues with HDMI, I would say your good. My posts are mostly for 2 channel and cables for it.
You do realize that regardless of the over-built quality of any cables you use, be they speaker cables, RCA or other pre-amp signal, or power, the electrical pathways within your electronic gadgets and speakers remain the same, right? The neck of the funnel is always a fixed diameter regardless of how wide the bowl is. Thicker, lower-gauge cables can prevent signal loss from excessive DC resistance for long runs; but here is no such thing as a passive cable that
adds signal. You ought to know from your electrician experience that a 15-amp circuit works just as well with Romex 12-3 as it does with 8-3, and both will power a 60w lightbulb to the exact same level of lumens. Likewise, with audio cables, there's no audible difference between adequate and overkill. The wiring and PCB within your AVR and other gadgets all use the finest bulk unbranded copper and nickel silver the Chinese factory has to offer. Or did you disassemble your electronics and solder in upgraded wiring?
You should try attaching an alkaline battery to the cable jacket to reduce distortion by keeping the cable's dielectric polarity primed. Since highs use shorter wavelengths, the electron flow supplying mezzo treble frequencies is not as forceful as bass, and thus more susceptible to collisions with neutrons in non-primed cables, causing your highs to sound dull and lifeless. Adding a battery makes the highs sparkle.
See, I can do it too. A licensed electrician ought to know Nordost's claims are marketing mysticism, not science.