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The best Cyber Monday deals so far: Apple, Bose, Samsung and more

BestReviews rounded up the best Cyber Monday deals of 2025 on TVs, headphones, laptops, vacuums, mattresses, beauty products ...
eCoustics

Cayin RU9 Review: The Flagship “Dongle” DAC/Amp That Doesn’t Act Like One

From the DAC stage onward, everything inside the RU9 is fully duplicated—true dual-mono, with the left and right channels completely isolated. That cuts noise and crosstalk to impressively low levels, ...