Sennheiser HD 400S Over-ear Headphones, Black

The Sennheiser HD 400S is a wired, over-ear headphone designed with a closed-back acoustic system. This circumaural build passively reduces ambient noise by fully enclosing the ears, which is practical for commuting and office environments. Its dynamic drivers cover a frequency range of 18 Hz to 20,000 Hz, engineered to deliver a balanced and natural sound profile. With a low impedance of 18 ohms and a sensitivity of 120 dB, these headphones perform efficiently with mobile devices and standard audio players without requiring an amplifier.

Built for daily use and portability, the HD 400S features a lightweight, 217-gram frame that folds for compact storage and transport. The unit connects via a detachable, 1.4-meter single-sided cable, which helps to reduce tangling during use. An in-line one-button remote with an integrated omnidirectional microphone allows for straightforward management of music playback and phone calls. The overall construction focuses on durability and comfort for extended listening sessions.

• Acoustic principle: Closed-back, over-ear
• Connectivity: Wired 3.5 mm connector
• Frequency response: 18 – 20,000 Hz
• Impedance: 18 Ω
• Microphone: In-line omnidirectional mic
• Controls: One-button remote for calls and music
• Cable: 1.4 m detachable single-sided cable
• Design: Foldable headband for portability
• Weight: 217 g