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Sennheiser HD 400S — Review & Specs | Pricepect | Pricepect

Home Over-Ear HeadphonesSennheiser HD 400S

Sennheiser HD 400S — image 1

Sennheiser

Sennheiser HD 400S

$69.99$89.9522% off

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HD 400SBlackOne Size 2 year manufacturer

Over-Ear Headphones

Expert Review Analysis

The Sennheiser HD 400S are lightweight, foldable, closed‑back over‑ear headphones featuring a detachable 1.4 m cable with a one‑button smart remote and built‑in omnidirectional microphone. They deliver a warm, bass‑forward sound with high sensitivity, making them ideal for portable listening and calls.

✓ Best for: Portable, on‑the‑go listeners who need lightweight, foldable headphones with strong bass, high sensitivity for phones or MP3 players, and built‑in call controls. Ideal for commuting, travel, casual music listening, and voice calls on smartphones or tablets, particularly for bass‑forward pop and electronic genres.✗ Not ideal for: Audiophiles seeking ultra‑neutral, analytical sound or users who require active noise cancellation for very noisy environments. Also less suited for listeners with low‑output source equipment that may struggle with the slightly higher measured impedance.

Pros

✓Lightweight design at 205–217 g with low clamping force of 2.5 N provides high comfort for extended wear.
✓High sensitivity of 121 dB V⁻¹ delivers loud playback from portable devices without additional amplification.

Price History

Current

$69.99

Average

$66.01

Lowest

$39.95

Highest

$89.95

Price trend (90d):0.0%

Best Seller Rank History

Now#611Best#137Worst#15,905 -430

Lower = better sales rank

Specifications

Audio

Frequency Response18–20,000 Hz

Microphone Frequency Response100–10,000 Hz

Impedance (specified)18 Ω Ω

Impedance (measured)22 Ω Ω

Sensitivity120 dB SPL @ 1 kHz 1 V dB

Connectivity

Cable Length1.4 m mm

Design

Height50.8 mm mm

Width50.8 mm mm

Length152.4 mm mm

Package Length195 mm mm

Package Width100 mm mm

General

BrandSennheiser

Model NameHD 400S

ColorBlack

SizeOne Size

Release Date2019-02-01

Ports

Jack Plug3.5 mm angled (right-angled mini-jack)

Power

Max Voltage2.1 V V

Max Current95 mA mA

Nominal Power0.2 W W

Mechanical

Clamping force2.5 N (low)

Acoustic

Maximum SPL125 dB

Electrical

Maximum voltage2.1 V

Maximum current95 mA

Nominal power rating0.2 W

Dimensions & Weight

Height2.0 Inches

Width2.0 Inches

Depth6.0 Inches

Weight0.478125 pounds

Research Sources

global.sennheiser-hearing.com

bhphotovideo.com

diyaudioheaven.wordpress.com

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User Reviews

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4.2

(2,651 reviews)

✓

Foldable, durable construction with detachable 1.4 m cable and one‑button smart remote enhances portability and on‑the‑go convenience.

✓Closed‑back dynamic drivers give extended bass response and passive noise reduction suitable for commuting.

✓Wide and precise soundstage with good instrument separation makes the headphones enjoyable for pop and electronic music.

Cons

✗Measured impedance of 22 Ω deviates from the spec 18 Ω, which may cause minor mismatch with some low‑output sources.
✗Resonance peak around 4.5 kHz due to bass elevation and porting can introduce a slight harshness in the upper mids.
✗Lack of active noise cancellation or advanced features limits suitability for very noisy environments.
✗No explicit user‑provided accessories such as a dedicated carrying case are mentioned in the packaging details.

From Expert Reviews

Praised by Experts

✓Reviewers highlight powerful yet non‑bloated bass that remains controlled and musical.
✓High sensitivity (121 dB/V) praised for achieving loud volumes on smartphones without distortion.
✓Lightweight (205 g) and low clamping force (2.5 N) noted for comfortable all‑day wear.
✓Warm sound tilt with good extension and no overshoot in step response appreciated for portable listening.
✓Spacious soundstage with precise imaging and crisp high‑frequency extension for percussion.

Criticized by Experts

✗Professional measurements note a resonance at 4.5 kHz caused by bass porting, affecting clarity.
✗Impedance measured at 22 Ω versus the claimed 18 Ω may lead to slight source mismatch.
✗No compression observed up to 93 dB SPL, but EU power limits restrict maximum output compared to some competitors.

Expert Opinion

Professional reviewers commend the HD 400S for delivering a strong, well‑controlled bass response and a warm, extended sound signature that works well with smartphones and MP3 players. The high sensitivity and low impedance make the headphones easy to drive, while the lightweight build and low clamping force ensure comfort during long listening sessions. Minor drawbacks noted include a 4.5 kHz resonance from the ported design and a measured impedance that is slightly higher than the specification, which could affect compatibility with some low‑output sources.

What Users Say

Everyday users, although not quoted directly, appear to appreciate the headphones' portability, comfortable fit, and punchy bass, especially for commuting and casual listening. The one‑button remote and built‑in microphone are frequently mentioned as convenient features, while no major complaints beyond the technical resonance have surfaced in the available feedback.

Common Complaints

A resonance around 4.5 kHz can cause a subtle harshness in the upper mids, and the measured impedance of 22 Ω versus the advertised 18 Ω may lead to minor source mismatch for some devices.

How It Compares

vs. Sennheiser HD 400

Advantages

✓HD 400S provides a more portable, foldable design with a detachable cable and remote, unlike the older HD 400.
✓Higher sensitivity (121 dB/V) in the HD 400S yields louder playback from smartphones without extra amplification.

Disadvantages

✗HD 400S exhibits a 4.5 kHz resonance that the HD 400 does not, potentially affecting clarity.
✗The older HD 400 may have a more neutral tuning for analytical listening, which some users prefer.

Choose the HD 400S for portable, bass‑forward use and on‑the‑go convenience; opt for the HD 400 if you prioritize a more neutral sound and a non‑foldable, solid‑build design.

Rating Trend

Rating4.2/ 5Reviews2,663+708 reviews -0.10