These Wired, Open-Back Sennheiser Headphones Are Nearly Half Off Right Now

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If you’ve been holding out for a good deal on wired headphones, the Sennheiser HD 660S2 is currently sitting at $349.99 on Woot, down from its original $679.95. That’s a serious cut for a set of headphones that usually don’t dip below the $400 mark elsewhere—for reference, they're $415.90 on Amazon right now. Plus, Prime members get free standard shipping (non-Prime buyers pay $6 for delivery), and it comes with a two-year Sennheiser manufacturer warranty. That said, Woot doesn’t ship this item to Alaska, Hawaii, or P.O. boxes.

Thanks to the open-back build of the HD 660S2, you get a wide, natural soundstage that makes instruments and vocals feel more spacious. And with 300 ohms of impedance, they do their best work when paired with a good amp or DAC, delivering deep bass without being muddy; even at louder volumes, the sound stays clean and detailed. Comfort is handled well too—the velour ear pads are soft, and the headband has precise notches for a snug, repeatable fit. Long sessions are fine for most, though you might notice some fatigue after several hours, depending on how sensitive you are.

You do have a couple of small trade-offs. There’s some audio leakage, as with any open-back design, so they’re not ideal for shared spaces. Also, while they include two cables (one with a quarter-inch connector and one with a 4.4mm balanced plug), both are just under six feet—fine for casual setups, but maybe a bit short for studio rigs or larger rooms, notes this PCMag review. Still, for those who want clear, balanced sound without artificial tuning and don’t mind being tethered to a wire, the HD 660S2 offers a lot of value at this price. For more options, here are our picks for best over-ear headphones.