Reviewers' ChoiceDiscontinued well over a decade ago, Synergistic Research’s quantum tunneled X-series cables ran with the best in terms of soundstaging, three-dimensional imaging, transparency, speed, leading-edge detail, noise reduction, and dynamics. However, as I wrote at the time, those cables could sound a bit harsh and grainy in the upper frequencies. And given the great amounts of detail they could convey, and their somewhat forward sound, they could be fatiguing in some systems.

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