Here’s a get rich quick scheme:
Sell 5.1 and/or 7.1 speaker wire sets. Use shielded 2 conductor cable. Put a fancy connector on every shield wire, and a magic box that all the shields connect to. Plug the magic box into the wall, tie the shield wires to ground and use the AC power to make some lights blink green, or red if a shield isn’t connected.
Sell for $10k.