Ultra Series THX 1000 Audio Interconnects. Multiple gauge wire networks for accurate, natural sound reproduction. 12-cut Turbine 24k gold contacts for a superior connection. Exceeds THX certification standards for proper system performance, reliability and ease of installation. Bandwidth Balanced design for increased clarity and sonic accuracy. MicroFiber insulation for deeper, tighter bass and clearer highs. Silver content solder joints for high conductivity connection that accurately transfers low level signals. PEX dielectric insulation provides low dielectric constant for faster, more accurate signal transfer. Separate protective mylar foil and copper braid shield for rejection of RFI and EMI. Dual Solid Core center conductors for deep, tight bass response.