Should there be audible/measurable differences when an earthing system is installed?

[nyxnyxnyx]

I revisited some old posts in various forums and platforms and I saw that many folks talked highly of the results they got when they have their system grounded.
I used to believe in that quite a lot but as the years went by, more and more devices and "pro tips" related to cleaning power, reducing noises, improving fidelity etc.... seemed to be way less consistent than I first thought, not to mention plenty of them were exposed as snake-oil products, or at the very least they had a misleading and inaccurate description.

I'm not an EE and I have very limited knowledge of how electricity works, but my main thought at the moment is if I can't hear noises or weird sounds, I shouldn't bother to think about grounding. Please broaden my knowledge and tell me why it should/shouldn't work.

 

[kongwee]

There is even loop and star ground. For safety, better follow the instruction.

 

[JSmith]

broaden my knowledge

Hey mate, this vid and thread by Amir should assist you;

Understanding Grounding in Audio (Video)

Technical explanation of different grounds in your audio system and all the misconceptions around ground loops, buzz and hum. Bill Whitlock Presentation: https://bennettprescott.com/downloads... Entreg Olympus Minimus grounding box review: https://www.audiosciencereview.com/fo...

www.audiosciencereview.com

JSmith