Yes, these are 'demo' cables, not new. I only say that they are sounding 'warm' in the context of my rig and compared to the JPS and Fusion Audio. More listening is definitely needed before I can say for certain. They sound good for sure...
Kubala Sosna Cables - Reality Check
I am auditioning some of the Kubala Sosna Expression interconnects and speaker cables. My initial impressions are that these wires are a bit to the 'warm' side of neutral. (Not complaining or criticizing the cables - just making an observation). Have you gotten similar impressions in your rig with these cables?