Oyayide Electric Original High Purity Oxygen Free Copper OFC 0.08 inch (2 mm) Single Wire Jumper Cable Y Terminals are Made in Japan Non-Plated OFC High Purity Oxygen Free Copper, No Color Tinting and Pure Copper is the best choice for creating the original sound "pure and straight" sound. By combining the same material of OFC Y terminals and OFC single-wire cables, you can eliminate the potential difference of different types of metals, and want optimal sound quality. Try the difference between gold-plated jumper plates that come with the speaker, or stranded jumper wires. The cable is a single wire, so please adjust the shape to a certain extent before connecting. The Y terminal is made of a non-plated finish of oxygen-free copper (pure copper) material. Contact deterioration may occur depending on the usage environment (moisture, etc.) We recommend periodically inspecting the connections, reconnecting, cleaning, tightening, etc.