Bad form to shatter dreams without offering some hope. There is one DIY project that will greatly improve any power cord, interconnect, or speaker cable: active shielding.
Used by Synergistic Research for years, Active Shielding is a known method and easily implemented. Ordinary battery ground strap is a braided tube pressed flat. Squish the braid, round it out, slide it over your wire. Solder a wire at one end, run it back along the inside to the other. Solder a small cap and resistor in series with this wire. Attach a 30V DC power supply. Quality matters but any cheap wall wart will do for proof of concept. Later on you can upgrade that for a nice improvement. Slide another one of those fancy plastic braided sheath things over the outside so it looks pretty. Or not. Works the same either way.
Plug it in. Be amazed, as this actually does work.
Used by Synergistic Research for years, Active Shielding is a known method and easily implemented. Ordinary battery ground strap is a braided tube pressed flat. Squish the braid, round it out, slide it over your wire. Solder a wire at one end, run it back along the inside to the other. Solder a small cap and resistor in series with this wire. Attach a 30V DC power supply. Quality matters but any cheap wall wart will do for proof of concept. Later on you can upgrade that for a nice improvement. Slide another one of those fancy plastic braided sheath things over the outside so it looks pretty. Or not. Works the same either way.
Plug it in. Be amazed, as this actually does work.