Audioquest Gibraltar Bi-Wire Speaker Cables - 15' pair

 AudioQuest Gibraltar loudspeaker cables - Bi-Wire 15' pair 

In the case of the Gibraltar speaker cable, looks are deceiving. What appears to be a simple twin-lead design is as complex and technology-laden as the Anaconda interconnect. For starters, the Gibraltar is what AudioQuest calls a "double-quad helix" configuration. Each half of the twin lead actually houses a helical wind of four solid ultra-pure-copper conductors. One set is for bass signals, the other for treble, and the overall twin-lead layout keeps the two sets magnetically separated in a true single biwire design—cool! 

The conductors and insulators are sized and chosen to best serve a specific function. The bass quad, for example, consists of two 16 AWG negative conductors and two 19 AWG negative ones, while the treble half uses 18 AWG positives and 21 AWG negatives. AQ calls this Spread Spectrum Technology, the idea being that any size and material of conductor has a distinct sonic signature that occurs over a specific frequency range. Mixing the conductors spreads out this signature over a wider range, preventing the effects from piling up to the point of audibility. A final bit of wizardry is the use of partially conductive carbon-loaded polyethylene as an insulating material on the negative conductors, which "damps radio frequency garbage from being fed back into the amplifier," according to AudioQuest. 

This is a bi-wire pair of 15' long speaker cables factory terminated in AQ spades all around. 

Condition is very good and they sound amazing!