High-quality subwoofer cable for connection to AV receivers: Optimum signal transmission in the low-frequency range for playing back powerful, deep bass in the field of music and home cinema, silver-plated, extremely strong and highly durable, copper-modulated OFC stranded wire (99,99% Cu), triple-screened signal lines, coaxial design, directional, 24-karat hard gold-plated solid metal plugs, triple protection, HRA-High Resolution Audio, includes Y-adapter 1-2 with the same cable quality for subwoofers with 2 inputs, 30 year warranty