QED's Performance mid-range subwoofer interconnect offers a very high level of screening when compared to normal line-level interconnects which is vital in ensuring that AC mains hum is absent from this delicate signal. Feel every beat with the performance subwoofer cable. Also available in custom made lengths. This cable features dual electro-static shielding for enhanced signal integrity and quasi-balanced twisted pair geometry to provide a pure, noise free experience. 99.999% oxygen free copper conductors will stand the test of time to provide you with the QED experience for life.