Sennheiser HD 400 Pro Review: New Amazing Reference Headphones! (2023)

Sennheiser HD 400 Pro Reference Headphones

Sennheiser HD 400 Pro Review

Rating: 4.5 out of 5.
  • Open
  • Circumaural
  • Impedance: 120 Ohm
  • Sound pressure level: 110 dB SPL (1 kHz / 1 V RMS)
  • Frequency range: 6 – 38.000 Hz

Sennheiser HD 400 Pro Review

Sennheiser has been a frontrunner in the headphone area for many years. With models overlaying the total spectrum from consumer to professional audio to audiophile, the HD 400 PRO headphones represent the most recent flagship model within the Sennheiser Professional sequence, an open-back design for music production, mastering, and mixing.

Sennheiser Logo

Sennheiser HD 400 Pro Sound

The highs are very good. Loads of precision and readability with no smidge of harshness. For critical studio work, there’s nothing better than a clear top end that won’t irritate you over longer periods. And that’s precisely what the HD 400 Pro presents.

The mid-range is equally satisfying. A superb range and depth that highlights the source without bringing it too ahead. Warm and airy because of the open-back design. The sound stage and imaging are additionally better than we anticipated at this value level. This could possibly be because of the angled transducers which have gotten more and more common. It helps replicate the direction of studio monitors for an extra clear and correct delivery.

The lows are punchy however as with different open-back headphones not as all-encompassing. And to be honest, we wouldn’t have it another way. The exact audio delivery is paramount for making important choices. One thing the HD 400 Pro gives.

The Sennheiser HD 400 Pro is a wonderful option, and at this value level fairly hard to beat. If you need clear, impartial, and well-defined sound, you’ll be pleasantly shocked at what these headphones provide.

Sennheiser HD 400 Pro Frequency Response

Sennheiser HD 400 Pro Build

The headphones use comfy velour earpads with an adjustable headband for sizing. With people with a bigger head than most, there was nonetheless plenty of room for a snug fit. We did discover that it has a firm clamp, inflicting some pressure across the ears.

Whereas this helps preserve a decent seal, in our case it additionally led to taking extra breaks than normal to rest the sides of my head. The housing appears sturdy for day-to-day studio use, however, all of the important elements are made from plastic, doubtless chosen to keep the weight down and make them extra affordable.

The HD 400 PRO seems strikingly much like the very fashionable HD 560S within the Sennheiser audiophile lineup. We didn’t immediately examine the 2, however, they do have rather a lot in common on paper. The 5XX collection has been around for a very long time—the ‘S’ in HD 560S designates a model new 120-ohm transducer.

This move was a direct success, so it’s no shock that Sennheiser would subject a PRO model with the identical transducer. It makes use of a specialized polymer mix in its diaphragm that improves transient response and detail above 10 kHz. The drive magnet achieves higher bass extension via excessive power, and a damping system manages airflow.

The brand new transducer design brings the distortion score right down to a formidable < 0.05% THD. The frequency response is listed from 6 Hz to 38 kHz, and it ships with each coiled and straight cable together with a 1/8” to 1/4” adapter.

The HD 400 PRO features angled transducers, and mixed with its open ear cups, can produce a large and correct soundstage. This selection of angled transducers (which is turning more and more frequently) is alleged to supply drastically improved distortion characteristics, notably at an excessive sound pressure level, which could be very apparent on first listen.

Transients form and dissipate with a purity that actually permits you to hone in on a sound in a minute element. This mixed with its open-back design offers an unlimited soundscape that stretches throughout the peripherals and envelopes the listener with unimaginable readability that’s sure to impress. That is by no means more obvious than when assessing panning choices and where all the things sit throughout the stereo field.

Sennheiser HD 400 Pro Brief Features:

  • Perfect for recording, editing, mixing, and mastering sessions
  • Open-back design provides natural and accurate listening experience
  • 120-ohm polymer blend transducer diaphragm and high-power drive magnet deliver the clear, deep audio that you require during sessions
  • Open earcups and angled transducer design widen soundstage to professional levels
  • Durable, lightweight construction with velour earpads to maximize longevity and comfort
  • 1.8m straight cable and 3m coiled cable with 3.5mm connector
  • 3.5–6.3mm adapter also included

Why You Need the Sennheiser HD 400 Pro

In case you don’t own a pair of open-back headphones, then Sennheiser’s HD400 PROs symbolize wonderful worth and audio high quality. They have got a refined pure tonal balance that instantly instills confidence, no smiley face EQ curve that may get individuals excited about cheaper models.

In case you produce and mix in an acoustically compromised room with budget studio monitors, we might advocate you take into account the HD400 PROs as an improvement to your setup. They’ll transport you to a much more costly mixing space than the equal studio monitor purchase.

We imply, what realistically-priced studio monitors are you able to consider that offer you a super-extended frequency response [6Hz to 38kHz (-10 dB)], tremendous low distortion, and ‘remove’ all of the room nodes in your house?

9.3Expert Score
Sennheiser HD 400 Pro Review

With models overlaying the total spectrum from consumer to professional audio to audiophile, the HD 400 PRO headphones represent the most recent flagship model within the Sennheiser Professional sequence.

  • Very Comfortable
  • Nice Stereo Image
  • Neutral and Balanced
  • Affordable
  • No pouch
  • Leak sound from and to them due to open back system


The Sennheiser HD 400 Pro can be an interesting selection due to its value level. Studio headphones might be expensive. In many instances, the added investment is worth it however there’s a fine line between efficiency and value.

The HD 400 Pro does a wonderful job of balancing the two. You get nice sound and stable construction at a value that’s more than reasonable.

However, it’s missing in a single space. Most headphones include a case or pouch. That is nice for safeguarding your headphones. Sadly the HD 400 Pro doesn’t include one.

Sennheiser was possibly trying to maintain prices low in order that the main target could be in direction of the headphones themselves. And when it comes to efficiency, this focus has paid off. However, if you happen to desire a case you’ll have to purchase one separately.

In case you are having any questions in regards to these headphones, please let us know in the comment section below or reach out to the Sennheiser website for more answers!


Nikoloski is the founder and main content writer and editor of Mixing Tips. With his experience in audio engineering, mixing, and mastering for over 15 years, will provide hands-on experience and expertise in all the matters covered on this website.

We will be happy to hear your thoughts

Leave a reply

Mixing Tips
Shopping cart