USB was never designed to carry high-quality audio hence in effect laying interconnects and PCs side by side the USB cable was not a “problem”. Our flagship USB cable, Gemini, separates audio & power (the equivalent of separate interconnects and PCs) whilst the RF silencers on both of these cables are urban dwellers for example, where there are numerous radio stations emitting strong signals that would benefit from. Lastly, the 90 ohms is a big deal as this is USB standards and anything that differs from this may cause some issues. The Gemini functions as follows; The audio symbol only carries data & related –  (Negative) and + (Positive) Power symbol only carries power & related 5V and Ground The Mercury is standard having all 4 contained in the one USB cable.