A letter in a hi-fi magazine (Hi-Fi News and Record Review, but I'm not 100% sure) years ago from someone who was upgrading his system.
He started by describing the upgrades to the cables and connectors. Then moved onto rewiring the amp with better quality conductors. Rewiring his house for a better electrical feed into the kit. He then described chasing his dream of perfect audio further by liaising with his local power company to get the substation upgraded. Finally (the punchline) was that he had written to the power generation company to change the isotope of uranium they used to get better bass.
Made me giggle.