Good heavy COPPER wire, with red copper ends will work perfect.
#10 @ 3-5 meter
#12 @ 1-2 meters
Make sure whoever makes them twist the last 10-12" the direction of the stands in the construct, CW or CCW. It may sound weird but it really does help.
Some people like med to heavy copper bottom to top. That twist is for noise but it does "SOUND" different if you twist by the natural weave of the copper. All my materials are Clockwise, so I twist the last 12" CW at two twist per inch for # 12 - 8, more twist per inch for anything smaller.. That will cover a single wire run also (Non biwire).
BTW that construct will fatten the mids and can tame a harsh hard dome a bit, too. Works better than a network box in the cable .. :-)
T12-24 # 22 N5 copper (weave) or better is a serious cable to beat too.. Just a DEAD quiet heavy load space age tech cable. I got a pair cookin' right now. 106.00 usd gold over copper ends. spades. VERY much worth the wait.. 2-4 weeks. I did get one set in 5 days though..
1-200.00 3 meters or less for a pair.. 2 weeks from CHINA.. OH yes, CHINA.. I've just been blown away.. The 90% silver clad teflon ribbon cables.. Mercy do they sound good.. 120.00 usd 3 meters..PAIR..
Regards