Sennheiser HD 400 PRO

Q: Is the Sennheiser HD 400 PRO suitable for casual music listening?

Yes, but please note that its sound is very neutral and flat, designed to reproduce the original recording without coloration or bass enhancement for specific music genres, offering a different listening experience than consumer-grade Hi-Fi headphones.

Q: What are the differences between the HD 400 PRO and HD-280 PRO?

The main difference lies in their design. The HD 400 PRO is open-back, offering a wide and natural soundstage, suitable for mixing; the HD-280 PRO is closed-back, providing good sound isolation, suitable for real-time monitoring during recording.

Q: I'm new to recording, should I choose the HD 400 PRO?

If your primary need is to learn mixing and audio editing, the HD 400 PRO is an excellent entry-level reference tool. If you mainly intend to record vocals or instruments, it's recommended to consider closed-back headphones with better sound isolation.

Q: Does the HD 400 PRO require a headphone amplifier?

While most audio interfaces can drive them, their 120-ohm impedance means pairing them with a dedicated headphone amplifier will yield better dynamics and detail. This is the officially recommended combination to fully unleash their potential.

Sennheiser HD 400 PRO｜Professional Studio Monitor Reference Headphones

Open-back Reference Monitoring Headphones Designed for Mixing and Mastering

The Sennheiser HD 400 PRO is a professional studio reference monitoring headphone launched by Sennheiser, featuring an open-back design and equipped with an exclusively developed 120-ohm polymer-blend diaphragm driver. Its design aims to deliver an extremely neutral, precise, and uncolored sound, allowing mixing engineers and music producers to make the most accurate judgments during critical mixing and mastering stages, ensuring consistent performance across any playback system.

Compared to traditional closed-back monitoring headphones, the HD 400 PRO achieves a wider, more natural stereo soundstage through its open-back earcups and angled transducer design. This significantly reduces listening fatigue during long working sessions and accurately reproduces the optimal listening position (Sweet Spot) experience found in top-tier acoustically treated studios.

Quick Facts

Brand: Sennheiser
Model: HD 400 PRO
Headphone Type: Open-back, Circumaural
Impedance: 120 Ohms
Frequency Response: 6 Hz - 38,000 Hz (-10 dB)
Total Harmonic Distortion (THD): < 0.05% (at 1 kHz / 90 dB SPL)
Applicable Scenarios: Studio Mixing, Mastering, Podcast Monitoring, Audio Editing, Critical Listening

Who is the Sennheiser HD 400 PRO suitable for?

使用者建議分析(點此展開)

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適合誰購買

Mixing and mastering engineers who require an extremely neutral, uncolored sound for precise judgment.
Music producers seeking a wide soundstage and accurate instrument separation for arrangement and audio editing.
Podcast creators or content creators who need a monitoring tool that can be worn for long periods with natural, non-fatiguing sound.

誰不適合購買

Users who need to record or monitor in noisy environments (open-back design leaks sound and has poor isolation).
Consumers primarily using them for commuting or outdoor music listening (open-back design is not suitable for public places).
Hi-Fi music enthusiasts who prefer heavy bass or specific sound coloration (these headphones have an extremely flat sound).

Sennheiser HD 400 PRO Core Technologies and Features

Professional Reference Sound Quality: Designed for critical listening tasks such as mixing and mastering, providing neutral, precise, and uncolored sound reproduction to ensure cross-platform consistency of your work.
Open-back Earcup Design: Creates a natural, wide stereo soundstage, significantly reducing in-ear pressure and listening fatigue, simulating an ideal speaker monitoring environment, allowing you to work comfortably for extended periods.
Angled Transducer Arrangement: Unique transducer angle design optimizes stereo imaging, precisely reproducing the sense of space and instrument positioning in recordings, as if you were in the sweet spot of a professional studio.
High-Efficiency 120-Ohm Transducer: Utilizes a special polymer-blend diaphragm and powerful drive magnets to deliver deep and clear bass response, while keeping Total Harmonic Distortion (THD) to an ultra-low level of less than 0.05%.
Lightweight and Comfortable Fit: Durable, lightweight construction weighing only 240 grams, combined with soft, breathable velour ear pads, ensures extreme comfort even during hours of mixing work.
Detachable Cables: Includes two cables, a 1.8-meter straight cable and a 3-meter coiled cable, allowing flexible replacement according to different studio setups or usage scenarios, and comes with a 3.5mm to 6.3mm screw-on adapter.

What's in the Box

1 x HD 400 PRO Professional Reference Headphones
1 x 3-meter Detachable Coiled Cable with 3.5mm connector
1 x 1.8-meter Detachable Straight Cable with 3.5mm connector
1 x 3.5mm to 6.3mm (1/4 inch) Screw-on Adapter

Tech Specs

Acoustic Principle	Open, Dynamic
Wearing Style	Circumaural
Frequency Response	6 Hz – 38,000 Hz (-10 dB)
Impedance	120 Ω
Sound Pressure Level (SPL)	110 dB (1 kHz / 1 Vrms)
Total Harmonic Distortion (THD)	< 0.05 % (at 1 kHz / 90 dB SPL)
Cable	3m coiled, 1.8m straight (both detachable)
Connector	3.5mm (1/8") stereo jack, with 6.3mm (1/4") adapter
Earpad Material	Velour
Weight (without cable)	240 g (8.5 oz)

Sennheiser HD 400 PRO Pros and Cons

Pros & Notes (Click to expand)

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Pros

Extremely flat and neutral frequency response, ideal for mixing and mastering.
Open-back design provides a wide, natural soundstage, significantly reducing listening fatigue.
Lightweight design and velour ear pads ensure extreme comfort even during long listening sessions.
Includes both straight and coiled detachable cables, offering high flexibility to meet different work requirements.

Notes to Know

Open-back design offers no sound isolation and is not suitable for noisy environments.
Sound leaks outwards, making them unsuitable for quiet public places or near studio microphones.
The 120-ohm impedance suggests pairing with a headphone amplifier or professional audio interface to unlock its full potential.

Sennheiser HD 400 PRO FAQ

Q：Is the Sennheiser HD 400 PRO suitable for casual music listening?

▼

A：Yes, but please note that its sound is very neutral and flat, designed to reproduce the original recording without coloration or bass enhancement for specific music genres, offering a different listening experience than consumer-grade Hi-Fi headphones.

Q：What are the differences between the HD 400 PRO and HD-280 PRO?

▼

A：The main difference lies in their design. The HD 400 PRO is open-back, offering a wide and natural soundstage, suitable for mixing; the HD-280 PRO is closed-back, providing good sound isolation, suitable for real-time monitoring during recording.

Q：I'm new to recording, should I choose the HD 400 PRO?

▼

A：If your primary need is to learn mixing and audio editing, the HD 400 PRO is an excellent entry-level reference tool. If you mainly intend to record vocals or instruments, it's recommended to consider closed-back headphones with better sound isolation.

Q：Does the HD 400 PRO require a headphone amplifier?

▼

A：While most audio interfaces can drive them, their 120-ohm impedance means pairing them with a dedicated headphone amplifier will yield better dynamics and detail. This is the officially recommended combination to fully unleash their potential.

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DOA / Non-human defects: Within 7 days of purchase, after verification, customers may request return or replacement.
Exclusions: Damages from misuse, unauthorized modification, consumable parts, natural disasters, or improper use beyond instructions.
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