Low smoke polyvinyl chloride does not release poisonous gases if ignited, so it is often installed in poorly ventilated areas. Our professional-grade speaker wire is comprised of oxygen-free copper conductors, ensuring that it delivers audio signals with the highest fidelity. The 16 AWG speaker cable is our most popular and versatile speaker cable. Suitable for runs up to 50 feet, the cable is also flexible and easy to work with.