Power cord - 5 ft vs 10 ft ?

I have a transparent power isolator and many of their Power cords. Glad to hear it reduces the noise. I’m skeptical about noise analyzers because they tend to make the problem sounds really bad by amplifying the noise so you can hear it. But if you move them around to different outlets in your home you’ll see differences. How meaningful this will be to your system is anyone’s guess.
 

Even dedicated circuits Will share noise from everywhere else in your house.  I installed a dedicated circuit with 10 gauge wire so the electricity supply would be more responsive to audio system demands, ie. Not impeding those electrons.

Also skeptical of really nice power cords being recommended to attach to a company’s power conditioner. They contend it makes it even better. It may make things better like they say.

Nevertheless, if your system is very revealing and on the upper end, having well shielded power cords and an unrestrictive power conditioner has merit.

@markusthenaimnut 

Blown away by your record collection.  I remember having a 45 Record player with an automatic Stack feeder which for singles made a lot of sense.  For you, and probably not kosher, how nice it might be to have an automatic feeder for your collection.  That way you can plan out a whole afternoon and never have to get up and those late night parties will never have to contend with extended silence.

How does one choose and then find what to play?

@jumia Thank you for your kind comment about my record collection. It has been fun and still is growing, though at a slower rate. 

How do I choose what to play? Great, great question. Believe it or not, mostly i am streaming these days. Saves wear and tear on the cartridge and it is really stressless. Through my bluesound node2i and my orchid it sounds pretty good.

Currently I am running a 25’ exertion cord to my subs from the back of the room because of a weird ground loop issue I can’t shake. I guess that puts me in the power cords don’t matter camp lol. 

@james633 

If you have a ground loop issue then it has to do with the fact that some of your components are connected to your breaker box through circuits that have a different resistance than others… this causes a trickle of current running through your system. 
 

For instance, I had a dedicated circuit for my power conditioner and plugged my amp into a shared circuit (a typical home outlet). I had a hum. If I used an extension cord from the same duplex receptacle for my amp it would go away. But this compromised the sound quality. I have two breaker boxes. I had a second direct line put in…adding a circuit breaker for the other direct line in the breaker box adjacent from my first. Problem gone. 
 

Now. As far as sound quality, power cords make a big difference.