[How to do instruction] Raspberry Pi power Supply

[Tenbagger]

Can someone please help me understand why a battery isn't a better option especially for the low cost? Seems to me that a battery will add absolutely no noise. Thanks.

Energyi

I regularly run moOde on Raspberry Pi 3 B+ headless from battery pack (2.4 A) with headphones, and just as often from the official switching PSU with headphones. In my experience the sound is noticeably more lively when connected to mains, and hands down better. (It makes me wonder if a battery is quick enough for changes in power demand from the DAC, but I am just a lay man...)

I have ordered a linear PSU, hoping to experience, again, noticeably better sound.

Linear PSU received. The last few hours have been... Bliss!

Better sound; warmer, more oomph, seemingly more truthful details. 

For anyone interested: I have not done any soldering (not trying to power the analog part separately). The PSU is 5.15V at 3A: http://www.tomanek.net.pl/tomanek-ulps-m...2-pi3.html