The Sennheiser HD 400S is a closed-back, around-ear wired headphone with a single-sided detachable cable and a one-button remote and mic. Its 18-ohm impedance and 120 dB sensitivity make it easy to drive from a phone or laptop, and the folding design plus 217 g weight keep it portable. It suits commuters, students and office listeners who want Sennheiser tuning without a battery. Against wireless rivals it trades Bluetooth and ANC for a simpler, lighter wired setup; owners generally praise the sound and comfort for the class, while some find the cable and clamp less refined.
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Rated 4.4 out of 5 from 65 ratings, the HD 400S is generally well received for its sound and value. Owners like the bass and the light, foldable build; some criticise the cable, the clamp and the limited remote.
The Sennheiser HD 400S is a pair of closed-back, around-ear headphones with Sennheiser dynamic drivers. The drivers give a well-extended sound response with dynamic bass. The closed-back design reduces background noise.
The headphones are lightweight and have a sturdy folding design, so they pack down compact for travel. A detachable single-sided cable has a one-button smart remote and a built-in microphone. The remote controls music and handles calls.
