Sennheiser’s new HD 820 closed-back headphones will shake up the audiophile world

When friends ask me about my endgame headphones — the ones that I would buy, love, and cherish above all others — my answer is usually the Sennheiser HD 800 S, a pair that I reviewed back in 2016. I’m not alone in my admiration for Sennheiser’s pricey flagship cans, and I suspect I won’t be alone in my profound excitement and curiosity about a new Sennheiser HD 820 that the German audio company just announced at CES.

The 820 is a closed-back variant of the 800 S, adding a measure of isolation between your music and the surrounding environment. The original 800 S is like a sieve when it comes to letting outside sound in, and it pushes almost as much volume out of the headphones’ sides as it does into your cranium. There’s good reason,…

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