Sound color with different jumper materials,

helmholtzsoul, Now, I can hear the singer breathing, but before, it was as if inside the loudspeaker, the fluidity of the music was fighting, because of the bad connection of the loudspeaker and jumper wires. Now it's so much more alive, my moderately deaf ear is able to appreciate the music, there are so many details that stand out now. It really is another musical world.

@audiosens - I have tied a few different jumper recipes and also exchanged  emails with a fellow DIYer in Europe, who performed even more extensive tests. Here's what I settled on...

• the jumpers are 20" long - that was the optimum length he believed provided the best sound 
• the jumpers are made from 2 x 18 gauge solid UP-OCC copper wire - you can use UP-OCC silver, but it is NOT a night and day difference - at least on my system
  • each wire strand is in its own oversized Teflon tube
    • the internal diameter of the tube is 25% larger than the outside diemeter of the wire
    • this basically provides about 95% air gap around the wire, which minimizes the value of Dielectric Constant to a value very close to that of AIR
    • this improves greatly the clarity and details
  • the two wires are twisted together - one twist every 3"-4"
• they attach to the speakers using KLE Innovations Banana plugs
  • I have tried other connectors (banana and spade) and bare wire connections and these banana plugs outperformed each method by a considerable margin.

I get my UP-OCC hookup wire and other supplies from Parts Connexion

If interested - I also build my own DIY speaker cables - the construction details can be found here

• Helix Speaker Cables
• and here is what other member think of them
  • Helix DIY Cables

Hope that helps - Steve

@audiosens 

Now, I can hear the singer breathing, but before, it was as if inside the loudspeaker, the fluidity of the music was fighting, because of the bad connection of the loudspeaker and jumper wires. Now it's so much more alive, my moderately deaf ear is able to appreciate the music, there are so many details that stand out now. It really is another musical world.

The is precisely why I suggested in my previous post eliminating the need for jumper cables by going inside the speaker and attaching the base wires to the high frequency binding posts. Jumper wires always degrade the sound due to the extra connections.