Not really DIY as it takes no skill except listening! But sometimes components simply don't match or a particular wire makes the music sound different. I read over at AK that some folks really liked the Home Depot extension cord as wire. Use the white and black wires as you don't need the green (which is the ground, I believe). I tried this and they sounded excellent on my vintage three way speakers with the Denon receiver. Good match! But when I tried them with my tubes, they sounded muffled. Bad match! Either that or I've completely lost it... Any other examples or tips out there?