No piece of audio gear requires a dedicated line! Who told you such nonsense? A preamp, power amp, streamer, DAC ... don’t draw much current. They are not stoves, refrigerators, washing machines, dryers which suck up a lot of current!
Dedicated line question
If a piece of equipment requires a dedicated line/ outlet, is it imperative that that outlet be directly connected to its own breaker, or is it no different than if say one breaker/ fuse impacted 6 outlets but the other 5 outlets had and would never have anything plugged into them?