Sydney 3.5 mm to RCA Jack Cable This jack cable impresses with its asymmetrical double balanced geometry, foam polyethylene insulation and noise reduction on metal layer system (NDS) and cold welded gold-plated connectors. AudioQuest Sydney is optimized for the single-ended world. It consists of high-performance cables that take full advantage of AudioQuest’s decades of experience in carefully matching design and material selection: ‘Do No Harm’ for the original audio signal. Solid copper + (PSC +) – conductors with perfect surface o Asymmetrical double balanced geometry o Polyethylene air pipe insulation o 3-layer carbon based noise dissipation system (NDS). Cold welded, direct silver-plated, pure purple copper connectors