1) HiFiMan HE400se Headphones ($149)

I’d argue that the HE400se sounds better than any headphone you could buy 10 years ago, with a near-perfect balance of bass to mids to treble and a delicate, spacious sound that beats all but the best headphones on the market. And it’s comfortable too. To get the best out of it, you’ll need to connect an outboard amplifier to your mobile device—but any $50 amp dongle should work fine. It’s open-back, though, so it doesn’t block external sounds.

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