The QED Signature Audio 40 is the culmination of 40 years of QED engineering expertise put into one exceptional cable. Crafted with Silver Plated 99.999% Oxygen Free Copper conductors and Teflon™ diel more→ectric the Signature Audio 40 ensures the purest signal transmission delivering remarkable audio clarity and fidelity. The cable undergoes Cryogenic treatment eliminating material fractures during manufacturing resulting in improved tonal balance adding a touch of refinement to your music. This cryogenic process is often used in the manufacturing of musical instruments such as trumpets and other brass instruments and is known to improve their performance in a pleasing and satisfying way. Engineered fo…