QED Reference XT40i Speaker Cable ** PLEASE NOTE THIS IS FOR A SINGLE LENGTH OF TERMINATED CABLE, IF YOU WOULD LIKE A PAIR PLEASE SELECT AND BUY TWO IN THE QUANTITY BOX ** This pure oxygen-free copper cable uses an evolution of QED's established X-Tube technology to guarantee superb timing and stereo imaging, and adds the brand new and highly innovative Air Gap dielectric to bring unheard-of rhythmic accuracy and musicality to a cable of this modest price. Very low DC resistance adds unrivalled frequency response to XT40i's already potent audio capability. The result is a cable that advances on the class-leading standards set by its predecessor. Air Gap Dielectric By increasing the separation of the conductors inside the cable, and therefore the amount of air between them, QED has.