Sennheiser HD 4.40 BT Review


Versatile, vibrant and value for money— Sennheiser HD 4.40 BT is a jack of all trades in the world of headphones.

These headphones are designed as daily drivers and are revered for their boosted bass add-on and reliable battery life.

Besides, their detailed sound signature along with the breathability they provide can absorb even the not-so-audiophile types.

On the downside, they lack Active Noise Cancellation (ANC) features and are therefore not very a good option for commuting.

However, their great 25-hour battery life will be a blessing for even the longest flights.

Thus, Sennheiser HD 4.40 may not be the best headphone in the market but can surely be your can-do-everything and take-me-anywhere partner.

So is it worth your deal?

Join us as we examine the various factors one would look for in a headphone and match them with the features of Sennheiser HD 4.40 BT to see if it deserves a place in your wishlist or maybe even your bag.

Product Specifications

Weight225 g
Wearing styleAround-ear
Frequency Response18 to 22,000 Hz
Connector2.5 mm detachable cable
Sensitivity113 dB
Impedance18 ohms
Active Noise Cancellation (ANC)No

Inside the box

The headphone comes in a rectangular box with the Sennheiser logo and other specs and information on it. The box has everything that Sennheiser HD 4.40 BT has to offer you.

Upon opening the box, you would find a transparent plastic holder that contains the following items:

  • One micro USB cable to USB cable for charging.
  • One proprietary 2.5 mm to 3.5 mm cable
  • One guidebook and warranty booklet
  • One case
  • Sennheiser HD 4.40 BT headphone


Sennheiser HD 4.40 BT headphones cast a perfect balance of the wide variety of features anyone would expect from their headphones.

Let us look at each element one by one and experience the quality that this headphone is.


The first thing that strikes anyone about Sennheiser HD 4.40 BT is its impeccable design. The earpads are plush and exceptionally comfortable.

However, there should have been more cushioning in the headband to pad the scalp from mild pressure spikes during long listening periods.

Besides, the controls such as the power button, volume control button, and navigation button are situated on the right earcup’s side panel.

The navigation or playback button is also the voice-controller for managing calls. On top of that, the minimalistic approach of designing this headphone using high-quality and lightweight material is the reason for its elegant finishing and style.

Overall, the classic, comforting, and sleek design makes Sennheiser HD 4.40 a class apart.


The high-quality ear-padding makes Sennheiser HD 4.40 BT a comfortable experience. On top of that, the specific around-ear design with deep ergonomics ensures comfort even over long listening periods.

On the bottom line, the relatively small ear cups, although apt for small ears, can irritate people with larger-than-average ear size when used for long hours.

Also, the headbands lack proper padding and can lead to mild pressure developments on the scalp over long listening sessions.

Summing up this headphone carries the comfort of cushioning that is bound to make you feel home.


Design and comfort are important aspects, but the sound is undoubtedly the prime purpose of a headphone.

And, Sennheiser HD 4.40 BT brings no disappointment. The headset mixes the well-tuned and timeless mids with powerful bass.

Besides, this closed-back headphone has a characteristic signature and soundstage that is likely to sound-bound anyone.

Their top-notch performance with highs, mids, and lows is quite evident, but what is astonishing is their ability to deal with metal and guitar music.

Following are some factors that will help in gauging the sound quality of these headphones:


Sennheiser HD 4.40 BT has a powerful and extended bass that performs without over-pouring itself. The bass touches low into the low frequencies and also elevates the mid-bass from the sub-bass.

It is the controlled and well-balanced nature of the bass that makes this headphone a perfect choice. However, this balance may not be very inviting for the bass-lovers.


The mids of this headphone are great. There’s a peculiar kind of warmth in the low-mids while the high-mids define fineness. Overall, the mids are accurate and therefore make vocals sound natural and appealing.


Water-clear trebles support the high-performing mids that this headphone has to offer. Lower trebles cohere well with the upper mids, resulting in a perfect balance of tunes. On top of that, the trebles are detailed and smooth, without any jagged peaks.


Sennheiser HD 4.40 BT outperforms almost every other close-backed headphones with its detailed soundstage. This enables these headphones to play classical music in a manner no one in their price range can do.

Wired Mode

Although the sound signature is preserved whether you listen in wired or wireless mode, these headphones are found to be performing even better when used wired.

In particular, mid-bass is found to be more striking, and the trebles seem to have an enhanced gradient between their scales. Additionally, pairing this headphone with a Headphone Amplifier can enhance the sound quality to give you a timeless experience.

Noise Handling

The noise handling ability of this headphone is poor. They lack an active noise cancelling system and therefore fail to isolate the listener against low-frequency noises such as those of engines.

However, in the mid-range of frequencies, they give a promising reduction of more than 10 Db. Also, in the treble range, they are found to provide isolation of about 31dB from noises.


Performance encompasses and gauges most of the important factors that one would look for in a headphone. Sennheiser HD 4.40 BT delivers a good 25-hours of battery life along with powerful bass and complimenting treble.

The wireless feature supports up to a standard 10 meters of range without any fluctuations. Sennheiser HD 4.40 BT is observed to deliver a powerful low-frequency response even at high volume levels.

Also, it is supported by a striking balance of an extended bass that is bound to impress anyone. For instance, the beats of drums are elevated by a profound bass, thus making the sound rich and balanced.

A similar elevation is experienced when playing guitar tunes. Summing up, the headphone gives a much detailed expression of the music played.


Sennheiser HD 4.40 BT may not have the best controls in terms of responsiveness but are bound to impress anyone with their functional scheme distribution. The control buttons are distinct and offer ease of operation.

The headphone comes with numerous controls such as power, navigation, call management, playback and volume control situated on the right earcup’s side panel. However, the feedback seems to be poor, and one may get an annoying audio queue during volume controlling.


These headphones have a tight fit with a seal around the ears. This feature, although good for noise handling, obstructs an ample amount of airflow. Thus, making these headphones not-so-breathable. Overall, Sennheiser HD 4.40 BT can be an okay choice for casual listening but can become a matter of concern during high-intensity workouts.


Sennheiser HD 4.40 BT aren’t the most portable headphones in the market but can still be your one true companion. The 25-hour long battery life is the reliability one would seek for long journeys.

Also, the headphone is easily collapsible and therefore fits compactly in cases, leaving room for your other essentials. On the downside, these headphones lack ANC features; that is, they fail to cage lower frequency noises such as engine rumblings.


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Sennheiser HD 4.40 BT comes with a soft pouch that shields from mild scratches. However, the case isn’t strong enough to protect against severe physical damages such as those incurred after falling from heights. Besides, the case is not water-proof but does suit the compact design of the headphone.


These headphones are stable—stable enough to wear while running. However, they still aren’t the best workout fit owing to their bulky over-ear design. Although the pads are tight enough to seal from airflow, they are still vulnerable to fall off when used in rigorous motions. As a relief, the wireless design allows you the much-needed freedom of movement.


Long-lasting is what would describe Sennheiser HD 4.40 BT’s reliable battery life. The headphone promises 25-hours of battery life and easily delivers 20 hours of continuous play-time. On top of that, the battery does not expense any noticeable heat throughout its use. Therefore, ruling out any possibility of discomfort.

On average, the battery takes slightly over 2 hours to juice-up from zero. Although they don’t have a power-saving feature, the headphone can be used passively even with a dead battery by using an audio cable.

App Support

Previously, Sennheiser devices were complemented with a supporting app called CapTune. However, the company has discontinued this service lately. As an alternative, many Sennheiser devices use Sennheiser Smart Control as their companion app.

But this app isn’t compatible with Sennheiser HD 4.40 BT. However, if you happen to have CapTune ON your phone already, you can take a sigh of relief as the headphone runs well with the previous editions of this application.

Frequency Response Consistency

Sennheiser HD 4.40 BT headphones have a sub-par performance in frequency response consistency. These headphones are observed to be prone to consistency issues, particularly in the bass range.

On average, the headphone delivers a variance of 8 dB at 20 Hz across five sample test objects, which is a matter of concern.

Besides, Sennheiser HD 4.40 BT is also sensitive to certain types of glasses, in a way that they can damage the seal and cause a drop in the bass of these headphones.

However, these are relatively consistent across the treble range, with a little sensitivity to positioning.

Recording Quality

The recording quality of the integrated mic isn’t appealing. The sounds lack detailing and soundstage. For instance, a Low-Frequency Extension (LFE) of 306 Hz produces a sub-par sound that is relatively thin and feeble.

Besides, a High-Frequency Extension (HFE) touching 3.3kHz disturbs the detailing of the recorded or transmitted sounds and makes them muffle. Adding more to the worry, the correlation between the LFE and HFE is not uniform and therefore leads to an unnatural transmission.

Bluetooth Connectivity

Sennheiser HD 4.40 BT is Bluetooth compatible and supports Near Field Communication for easy and flawless pairing. However, this headphone does not support multi-device input.

The Bluetooth connection works best up to a range of 10 metres from the source. Besides, the latency which ranges typically between 200 to 220 ms works fine for listening to music.

However, this delay may become a thing of concern when watching videos or playing video games.

Value For Money

These headphones, with their versatility and vibrancy, are the best ones in their price range. Sennheiser HD 4.40 BT costs under £70 and is an absolute value for money deal for anyone seeking a diverse array of features from a headphone.

Pros And Cons

We have seen an overview of the varied features that this value-pack headphone has to offer. But buying headphones is more about comparisons and about weighing the available options.

It is about establishing an agreement with its Pros and Cons. Therefore, without any further ado, let us now meter them in Pros and Cons to see if it’s really worth your buy.


  • Good sound quality.
  • Fairly comfortable and durable design.
  • Low latency for Bluetooth headphones.
  • Great battery life.
  • Extended bass.
  • Exceptional soundstage for a close-backed headphone.
  • Collapsible head arm.
  • Well-balanced.
  • Easy to operate
  • Value for money.


  • Lacks proper padding in the headband
  • Ear-cups too small for more-than-average sized ears.
  • Sub-par isolation performance.
  • Bass is prone to inconsistencies across users and is found to be sensitive to glasses.
  • Cable lacks inline remote.
  • Breathability is poor.


Sennheiser HD 4.40 BT is arguably the best headphone in its price range. The headphone is designed intricately and produces good quality sound.

On top of that, Sennheiser HD 4.40 BT is decently comfortable with a high-end cushioning and has a low latency for Bluetooth headphones.

Sure, there are some fault lines, (we all have some) for example its sub-par isolation ability and inconsistency in its recording and sound transmission ability.

But these downsides can be bargained with its extended bass, matching treble, and an exceptional soundstage. Overall, they can be the best buy if you’re looking for a multi-purpose budget headphone.

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