I use the Siren II for my speakers for about six months, replacing the cables supplied by HP manufacturers. It is a cord formed by a cable rather rigid, very directional hundred (red plug = plug destination), and two sheets Neutrick. What I enjoy is its very high musicality: on an AC 15 Heritage HANDWIRED or Suhr Badger 30, the sound is better articulated the "crisp" saturations crmeuses is more shimmer ... the amlioration is obvious. I am very satisfied with this cable that allows me to exploit the full sonic potential of my hardware.