SENNHEISER HD 400U Wired Headphones

HD 400UFor more than 80 years, Sennheiser has stood for true sound. The HD 400U carries this legacy forward, delivering the unmistakable Signature Sennheiser Sound through a modern USB-C connection. No pairing. No batteries. Just pure, uncompressed audio, instantly.Signature Sennheiser SoundUSB-C digital plug-and-play connectionRemovable cable systemInline remote & microphoneClosed-back over-ear comfortSound that stays trueHear music the way the artist intended.At the heart of the HD 400U is the Signature Sennheiser Sound. Carefully tuned to be balanced and natural, it reveals emotional detail that standard headphones often miss. Clear and expressive mids, shimmering highs, and deep yet controlled bass combine to create a listening experience that feels authentic, immersive, and true to the music.Instant digital connectionPlug and play simplicity that lets the music speak.The USB C digital connection delivers uncompressed audio directly from your device to your ears. With no pairing rituals or batteries to manage, the HD 400U offers a reliable, plug-and-play experience across compatible smartphones, tablets, laptops, and computers. Just connect and press play.Instant digital connectionComfortable design, ideal to carry around.Lightweight and secure, the HD 400U is built for hours of comfortable listening. The closed-back over-ear design provides passive noise isolation while allowing the sound to breathe. Soft, replaceable ear pads and a foldable construction make it ideal for work, travel, and everyday use.Instant digital connectionFlexible and functionalThe removable cable system gives you the freedom to adapt to different devices. Use the included USB C cable with inline remote and microphone for calls and playback, or switch to an optional analog cable when needed.Specification Ear couplingOver-earTransducer principleDynamicAcoustic principleClosedPlugUSB CCable length1.4 mWeight (headphone)217 gHeadphones - Frequency response18 – 20,000 Hz (-10 dB)Headphones - Impedance18 ΩHeadphones - Sound pressure level (SPL)120 dB SPL @ 1 kHz, 1V RMSHeadphones - Total harmonic distortion (THD)<0.5% (1 kHz, 100 dB SPL)Microphone - Frequency response100 – 10,000 HzMicrophone - Pick-up patternOmni-directionalMicrophone - Sound pressure level (SPL)-44 dbV/PaWhat's includedOne pair of HD 400U over-ear headphonesOne USBC cable with inline remote and microphoneA quick guide to get you started