How to beat The Complete Set quest in Control Resonant and set up the cursed speaker system

The Complete Set is one of Control Resonant's longest and strangest side quests, tasking you to find a set of SINKKI D50 speakers and subwoofers around the world and set them up in a singular location, which itself leads to a peculiar choice at the end. There's five separate speakers and subwoofers to locate around the world and bring back to the Auction House to conclude the questline, and having done the mission myself and found the locations of every speaker, I'll lay out a full quest walkthr