Copper Speaker Wire - Oxygen Free, Tough & Flexible, For Home Theater Systems & Professional Use -18 Gauge 50 FT- By Audio Dynamics OXYGEN FREE WIRE: Our wires are oxygen free to prevent oxidation (like rusting), which enhances the quality of sound and prevents any electrical problems in your amplifier. EASY TO USE: Audio Dynamics' Copper Speaker Wires are conveniently wrapped around a circular spool that travels well and allows for convenient dispensing, measuring, cutting & storing. PREMIUM SOUND: The oxygen-free copper wire lowers inductance & capacitance to deliver clear audio performance within a wide dynamic range & ensures overall superior sound. FLEXIBLE & STURDY JACKET: The clear jacket is flexible & sturdy for easy installation and delivers high-quality undistorted signals to & from all of your audio equipment. AVAILABLE IN FOUR DIFFERENT GAUGES: Audio Dynamics' Copper Speaker Wire is a available in four different gauges to accommodate all of your audio needs and a variety of sound systems.