Featuring a gold-plated Pure Copper center pin, this true 75 Ohm connector features proprietary USA construction. With it’s unique 5-piece design, the RCA-750 is the rare RCA connector on the market which maintains a pure 75 Ohm impedance through the connector, ensuring tip to tip compliance of this essential specification! This is your assurance of excellent sound, high fidelity and performance. The RCA-750 also features a 7.5mm diameter cable entry hole to accommodate the larger jacket sizes of digital cables.