I have a pair of PS Audio XStream Statement Bi-Wire speaker cables. Bought 'em on closeout in 2005, so they were probably a 2003 or so product. When they were manufactured, they were the only cables designed specifically for bi-wiring. That is, the bass run was optimized for LF transmission and the treble run was optimized for midrange/treble. As such, the bass includes 3 or so very thick solid core copper conductors making for about a 6 ga. conductor. The treble run consists of smaller strands of silver-plated copper. For my bi-wirable Mirage M5si's they were just what I was looking for. They soundly trumped the MIT MH-750 double run I'd used before, and the signal transfer is so efficient I no longer felt a need to bi-amp these speakers.
The transparency and immediacy of the speakers improved significantly and the imaging and treble are very nice. Physically these cables are ridiculous--2" diameter and they weigh about 2 lbs. per foot per side. The cable is so heavy it's been known to snap off the banana plugs and I use a C-clamp to keep the cable from pulling my center channel speaker off its shelf.
But the sound makes 'em worth it.
The transparency and immediacy of the speakers improved significantly and the imaging and treble are very nice. Physically these cables are ridiculous--2" diameter and they weigh about 2 lbs. per foot per side. The cable is so heavy it's been known to snap off the banana plugs and I use a C-clamp to keep the cable from pulling my center channel speaker off its shelf.
But the sound makes 'em worth it.