Sennheiser
Sennheiser HD 400 S headphone
Over-ear headphones with 18 Hz–20 kHz response, 18 Ω impedance, 120 dB sensitivity, inline microphone and foldable design
- TypeOver the Ear
- ColorBlack
- Frequency Response18Hz-20KHz (-10 dB)
- THD< 0.5 % (1 kHz, 100 dB SPL)
- Input Impedance18 ohms
- Sensitivity120 dB SPL @ 1 kHz, 1V RMS
- Renowned Sennheiser sound quality for a unique listening experience
- Built-in microphone and remote for call and music control
- Closed-back around-ear design reduces unwanted background noise for comfort
- Lightweight foldable construction at 0.48 lb enables easy on-the-go storage
- 18 ohm impedance and 120 dB sensitivity ensure universal compatibility with portable devices
Closed-back over-ear design
The Sennheiser HD 400 S is a pair of closed-back over-ear headphones with a detachable single-sided cable ending in a 3.5 mm angled plug. A one-button inline remote on the cable handles music playback and phone calls through the built-in microphone. The folding construction reduces the footprint for transport and storage. The headphones weigh 0.48 lb.
Listeners needing portable isolation
Commuters and office workers who want passive noise reduction and a simple way to answer calls without reaching for a device will appreciate the closed-back cups and the cable-mounted remote. The 18 ohm impedance makes them easy to drive from phones or laptops. Buyers who prefer open-back soundstage or need active noise cancellation should look elsewhere.
18 ohm input impedance
With an input impedance of 18 ohms and a sensitivity of 120 dB SPL @ 1 kHz, 1V RMS, the headphones reach loud volumes from low-voltage sources such as smartphones and tablets without an external amplifier. The frequency response spans 18 Hz to 20 KHz (-10 dB), and total harmonic distortion stays below 0.5 % at 1 kHz, 100 dB SPL. The microphone covers 100 Hz to 10 KHz with a sensitivity of -44 dBV/Pa.
Highlights
- Renowned Sennheiser sound quality for a unique listening experience
- Built-in microphone and remote for call and music control
- Closed-back around-ear design reduces unwanted background noise for comfort
- Lightweight foldable construction at 0.48 lb enables easy on-the-go storage
- 18 ohm impedance and 120 dB sensitivity ensure universal compatibility with portable devices
Specifications
| Brand | Sennheiser |
|---|---|
| Model | HD 400S |
| Type | Over the Ear |
| Color | Black |
| Frequency Response | 18Hz-20KHz (-10 dB) |
| THD | < 0.5 % (1 kHz, 100 dB SPL) |
| Input Impedance | 18 ohms |
| Sensitivity | 120 dB SPL @ 1 kHz, 1V RMS |
| Connector | 3.5mm |
| Ear Coupling | Binaural |
| Cord Length | 4.59 ft. |
| Weight | 0.48 lb. |
| Microphone Frequency Response | 100Hz-10KHz |
| Microphone Sensitivity | -44 dBV/Pa |
| Compatibility | Universal |
| Features | Renowned Sennheiser sound quality for a unique listening experience. Built-in microphone and remote for call and music control. Closed-back around-ear headphones reduce unwanted background noise for your comfort. Lightweight, foldable headphones for easy on-the-go storage. |
| Package Contents | HD 400S around-ear headphones RCS 400 detachable single-sided cable with 1-button remote and 3.5 mm angled plug |
| Shipping weight | 0.47 kg |
| Package size | 241 × 213 × 102 mm |
Questions about this item
Does the 18 ohm impedance mean I can drive these loud enough from a phone?
Yes, the 18 ohm load and 120 dB sensitivity let a smartphone reach high volume without an extra amplifier.
What does the 18 Hz to 20 KHz range tell me about real-world sound?
It covers the full audible spectrum, so you hear deep bass down to 18 Hz and treble detail up to 20 KHz.
Is the 3.5 mm plug compatible with my laptop and console controllers?
The 3.5 mm angled connector fits standard headphone jacks on laptops, consoles and mobile devices.
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