iFi Audio Gemini Dual Headed USB Cable
The iFi Gemini Dual-Headed USB cable will rule them all. Audio and power cables are not laid side by side yet in the USB configuration because of its origins, transmits this way. The iFi Gemini carries Audio + Power in two separate cables. Critically, the special geometry adheres to the 90 ohm impedance specification better than even the USB 2.0 standard. Resistance is 4x lower than textbook. The FINAL USB machined connectors provide impeccable shielding from end-to-end. The atypicalrf3silencer design spans the whole of the frequency range to totally banish all noise.
With this unorthodox array of features, the Gemini Dual-Headed USB cable sonically, eclipses them all.
A simple, yet effective illustration is the graph below. The Gemini cable adheres to the 90ohm specification of the USB transmission protocol exhibiting just a 1% deviation from the 90ohm impedance end-to-end (ie. connector + cable together).
Other expensive audiophile cables by comparison, vary as much as 15% (or 78ohm-103ohm!) This one key parameter is often overlooked yet is essential to maximise the quality of the signal transfer.