Hands up if you actually know what ruthenium is. Don’t worry if you don’t, it’s just used as an external plating on these extremely luxurious open-back cans. More familiar expensive materials can be found within, with titanium-plated 40mm drivers, silver-plated copper wires with 99.99 percent purity and….for more, like the crazy price on these, go to TatsTechTalk.com

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