All Series 4 audio cables are assembled by hand in Orlando, Florida. 4 Series Subwoofer Y-Cables are designed to work with Subwoofers that do not have Left and Right inputs and where LEF is not available. Series 4 uses highly conductive ultra-pure oxygen-free copper (HC-OFC) developed specifically for audio applications. Since stranded wire admits higher frequencies and causes distortion, the Series 4 uses a single, solid-gauge wire chosen to accommodate low-frequency bass signals. The Twin-Axial tributary cable design has dedicated conductors with equal impedance for positive and negative signals. Signal conductors are wrapped with double shielding to prevent noise from reaching the single path. The Y-Series 4 Subwoofer provides a high-performance bass cable that looks as good as it sounds. The Series 4 subwoofer cable is stocked in Y-cables in lengths from 1 meter to 4 meters with custom lengths available. Hand-assembled from domestic and foreign parts in Orlando, Florida, USA. Heavy solid 22AWG HC-OFC conductors for enhanced bass Precision Twisted Pairs - Great for Audio LDPE eliminates distortion while maintaining flexibility Double shielding to reduce noise level Gold Plated Solid Brass RCA Connectors Decorative woven jacket over flexible PVC jacket .PZA MORE SPECS