Duelund cast Pio Hybrid Copper/Silver or Rs series with Silver Bypass PIO

erik_squires4,  grannyring4 Thanks guys!
We tried the Mundorf Supreme classic, but we want even better. Tweeter requires  4.7uF so maybe we will try Jupiter Copper.
What do you think about Silent Wire LS wire? I was told that this wire gives speed transparency and air sound.

Never heard it. Sorry. I would use a nice solid core wire in silk or cotton on that tweeter.  Jupiter makes nice solid core silver and copper wires in cotton and silk. 

Another great option, not in cotton or silk however, is the Neotech stranded silver with gold plating. Get the heaviest gauge which I think is 23 or 24 from Parts Connextion. This wire sounds absolutely wonderful, but is not cheap.  Much better than the Mundorf silver/gold wire based on my experience.  

Yes I would go with the Jupiter copper foil cap for sure. If you want even more air, articulation, space, and realism add a pure silver foil Duelund bypass cap .01uf.  This particular combo works so well together. I have found the net result (combo) to be the finest cap available at any price. 

For 3-way (2x7", 5", 1") we need many meters of hook-up wire. Neotech silver with gold plating is too expensive here.
What do you think about DH Labs Wire Stranded Silver-Plated Continuous Crystal Copper? Which is better to use pure copper or silver-plated copper?

This was just for the tweeter per your note? I never liked silver plated copper wire.  All of it I tried was too bright and aggressive for my likes. Confused about your needs now. 

I wire my speaker projects with Duelund stranded copper in cotton.  I use 20 gauge on tweeters, 16 gauge on mids, and 12 gauge on the bass.  Love it.  My favorite wire of all time.  I also like Jupiter solid core copper in cotton on tweeters and mids.