@Teo- Everything in our universe can be broken down to energy, vibration and frequency. Science has been working on figuring out the mechanics(ie: Quantum) for decades, a major breakthrough being proof of the Higgs Boson’s existence and it’s effect on other bosons. I’ve been trying not to type too much, but- you opened the window and saved me a lot of keystrokes. THEORIES? ABSOLUTELY! It’s been quite some time since Case-Western Reserve University, BUT- to my knowledge: no one has yet actually observed an electron, or proven categorically how electricity actually works/flows/travels. That’s why just about everything about it(outside of what has been measured/recorded/repeated) is still considered, "Electrical THEORY". I’d like someone on this site, that is so convinced(scientifically) that a fuse can’t possibly make an audible difference in a sound system, to approach the discussion on the level of Fermions, up/down type Quarks, and Leptons(Charged or Neutrino / tau or muon). OR- the effect of a non-zero in empty space, electrically charged, Gauge boson’s effect on either a W or Z boson. Pick your own theory(wave/particle/string/make up your own, geniuses).