Sennheiser HD 400S Closed-Back Headphones

Clear sound, isolation and everyday practicality.

The Sennheiser HD 400S are closed-back, over-ear headphones designed for focused listening, calls and daily use. Their closed construction provides passive noise isolation, helping reduce external distractions without electronic noise cancelling.

Equipped with dynamic drivers, the HD 400S delivers a balanced sound with controlled low end and clear mids, making them suitable for music, gaming, video calls and general listening. The built-in microphone and one-button remote allow easy call and playback control when connected to phones or computers.

Lightweight and foldable, they’re easy to carry and comfortable for extended sessions.

Features

• Closed-back over-ear headphone design

• Passive noise isolation for reduced background noise

• Dynamic drivers with balanced sound and controlled bass

• Built-in microphone for calls and communication

• One-button in-line remote for basic control

• Foldable design for easy transport

• Wired connection for stable, latency-free audio

Specifications

Brand: Sennheiser
Model: HD 400S
Type: Wired Over-Ear Headphones
Acoustic Design: Closed-back
Driver Type: Dynamic
Impedance: 18 Ω
Frequency Response (Headphones): 18 Hz – 20,000 Hz
Sound Pressure Level: 120 dB SPL (1 kHz / 1 Vrms)
Total Harmonic Distortion: < 0.5% (1 kHz / 100 dB)
Microphone: Integrated, omnidirectional
Frequency Response (Microphone): 100 Hz – 10,000 Hz
Connector: 3.5 mm angled plug
Cable Length: Approx. 1.4 m
Weight: Approx. 217 g

Package Contents

• 1 × Sennheiser HD 400S Around-Ear Headphones

• 1 × Detachable single-sided cable with in-line remote and microphone

• User manual