The Sennheiser HD 400S is a closed-back, over-ear wired headphone with a foldable frame and passive isolation: nothing to charge, no ANC hiss, no app. Built for people who want one pair for desk, couch and commute, it's also an easy pick as the travel or office set next to an open-back at home.
Who the Sennheiser HD 400S is for
Commuters and flyers: Closed cups keep room noise out passively, and the wired connection means nothing to charge before a flight.
Office workers: Passive isolation blocks room noise without ANC hiss or an app to manage.
Open-back owners who need a second pair: It folds down to go in a bag, making it the travel or office set alongside a more serious open-back rig at home.
Anyone tired of pairing and charging: Wired stereo means no pairing, no latency and no battery to look after.
Skip it if: you want active noise cancelling or Bluetooth; isolation here is passive and the connection is wired.
Sennheiser HD 400S key specs
Design: Closed-back, over-ear
Noise isolation: Passive (closed cups), no ANC
Frame: Foldable
Connection: Wired stereo
Power: None needed (no battery or charging)
Genuine Sennheiser stock, backed by a 1-year warranty and 45-day returns.
Sennheiser HD 400S vs similar options
vs FiiO JT3: Open-back with a 50mm PEK+PU driver for a more spacious sound, but everyone nearby hears it, so it's a home headphone; the closed-back, foldable HD 400S suits commutes and the office.
vs Audio-Technica ATH-M20x: A wired studio-monitoring headphone from Audio-Technica's M-Series, aimed at project studios and tracking rooms; pick the HD 400S if you want a foldable pair for home, office and commute.
Yes. Every unit we sell is genuine and brand-new, shipped in its original packaging, and backed by our 1-year TonePier warranty and 45-day returns.
Where does my order ship from, and how long does it take?
Every order ships from our warehouse in China, with full tracking, and most orders ship within 3 business days. Shipping is free on every order; most US orders arrive within 7–15 business days and most orders to other countries within 7–20 business days — see our shipping policy for details.
What if it isn't for me?
You get 45 days to decide. Keep the packaging, keep it in like-new condition, and send it back for a refund. Ear tips unsealed for hygiene reasons are fine — we expect you to actually listen.
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