Sennheiser HD 4.40 BT Wireless Headphone
Sennheiser HD 4.40 BT Wireless Headphone

Sennheiser is a brand that maintained the top-quality over the decades. They exceeded with the on-ear and around-ear headphones thanks to the alluring and pristine design, warm and crispy sound, and the impeccable bass capabilities. In 2017 CES, among the other things, Sennheiser unveils the Sennheiser HD 4.40 BT Wireless Over-ear headphone and Sennheiser HD 4.50 BTNC Wireless Active Noise Cancelling Over-ear headphone.

In this review, we are going to talk about the new design of the Sennheiser HD 4.40 BT headphones. But, also, set of new features, and whether does a new series of headphones mean the enhanced quality of sound and the bass.

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Sennheiser HD 4.40 BT – The Features

Sennheiser HD 4.40 BT is a Bluetooth 4.0 enabled Over-ear Wireless Headphone. Other features include NFC connectivity, the useful aptX codec, the durable battery life, and more. The headphone lacks on the Active Noise Cancellation feature, mostly to cut-off the price. By design it’s a Closed-back headphone, which blocks the outside ambient noise. If you are still a fan of Active Noise Cancellation, just jump to Sennheiser HD 4.50 BTNC which is almost the same headphone as this, plus it includes Active Noice Cancellation feature.

The Bluetooth and NFC Connectivity

This is probably the most important thing to mention. The Sennheiser HD 4.40 BT streams the music over Bluetooth 4.0 technology. More importantly, the pairing is easy and swift. For all the lovers of the wireless freedom, the headphones come with the selection of Bluetooth profiles: HFP (HFP (Hands-Free Profile), HSP (Headset Profile), AVRCP (Audio Video Remote Control Profile), and the A2DP (Advanced Audio Distribution Profile).

Easy to Pair: See the shortest guideline

Like already mentioned, the pairing is performed within the seconds by holding the pairing button until the red and blue LED lights turn on. After that, all you need to do is to find the Sennheiser HD 4.40 BT on your desired device (mobile music players, phone, tablet) and you are ready to dive into the world of the music. Also, the supported range is up to 33 feet (10 meters) while the headphones offer steady and safeguard connection.

The Near Field Communication (NFC) offers fast and reliable short-range connection between the headphones and a device that supports the NFC. Just like the Bluetooth, the pairing is fast, and only one touch away.

Apt-X Codec

The aptX codec is used for the crispiest, warmest, and deepest stereo musical experience. It allows the best of audio quality when streamed through the Bluetooth Technology. Thanks to the AptX codec, the wireless headphones not only match but exceed the best-wired headphone standards. More importantly, it is available on the HD 4.40 BT for the tremendous bass and dynamic sound when streamed via Bluetooth.

Battery Life

The Sennheiser wireless headphones are well-known for their lasting and durable battery life, which make them ideal for the long trips, including the long plane flights. The HD 4.40 is not an exception in this list. Its Li-On Polymer battery is estimated to last around 25 hours, making you enjoy the best of the music for a long time.

The charging cycle performs within two hours. It is advisable to charge up the headphones completely before using them. There is even the soothing voice prompts which will guide you about the remaining hours.

Once it’s full the LED indicator will show one blue light, while the completely empty battery will show the three red LED lights turned on.

Sennheiser HD 4.40 – The Design

Sennheiser HD 4.40 BT Wireless
Sennheiser HD 4.40 BT Wireless

The Sennheiser HD 4.40 BT offers a new and futuristic design. It features a plastic build, which is a difference compared to the Momentum series. Unfortunately, it offers only one color as of now. However, the mixture of the black and gray looks awesome for every occasion, not to mention that its’ simplicity also makes it versatile for different purposes. Being versatile, they can be used for the audio studios, office, gaming, and even sports if you are comfortable with the over-ear design.

Being unrestricted from the annoying wires, the HD 4.40 aims for the mobility. It is fairly comfortable, and portable. But, more design related features you can see below:

Intuitive Ear-cup mounted controls

Earcup of Sennheiser HD 4.40 BT

The controls including the built-in microphone are located on the earcups. Needless to say, the controls are very intuitive and easy to adjust to. With them, the volume changing can be extremely simple. The headphones will uninterruptedly allow you to find your own pace, and decide which song do you want to listen. More importantly, you can listen to the music, and answer the calls through those controls without intercepting a simple problem.


Despite the plastic build, we cannot complain about its’ quality. It has a sleek frame which contributes to a more fashionable accent while giving the necessary comfort to the head. The sturdy and tough plastic maybe serves to cut down the price but it definitely gives a classy touch to the headphones and gives them the lasting durability.

Portable and Foldable

Thanks to the battery life and the durability, the HD 4.40 are perfect for the long-lasting trips and adventure. They feel lightweight and respectfully portable to the ears. It is important to note that the headband is foldable.

Foldable Design

The foldable design allows the headphones to be packed into a small protection bag which will not damage the headset on your adventures. The ergonomic ear pads feel joy to wear because they do not push the pressure to the head.

Soft and comfortable ear pads

The ear pads were made out of the gentle leatherette which feel very convenient. Whether are you going to the trip, gaming, or prefer listening to the music outside, you can rest assured that the premium convenience will allow you to uninterruptedly spend a long time listening to the music, without worrying about a headache, or discomforts. More importantly, the premium cushions prevent the most of the outside noise to get inside your ears, giving a safeguard noise isolation.

The Sennheiser HD 4.40 BT package contains

  • the headphones,
  • carry case,
  • an audio cable with the 2.5 and the 3.5mm jack plugs, for the times you do not want to stream over the Bluetooth and
  • the USB charging cable with the micro-USB connector.

Sennheiser HD 4.40 BT – Performance

Although a large set of features and the pristine design are important to every set of headphones. The true high-end wireless headphones should excel with their superb performance and Sennheiser HD 4.40 BT has nailed it.

The Sound Quality

The powerful drivers help the HD 4.40 BT deliver the well-balanced and crispy sound. The Sennheiser headphones have always been focused on the bass itself. And with this model, they proved that the bass quality can be even more improved. It is needless to say, that the HD 4.40 bass is fascinating, deep, powerful, and grounds shaking.

The depth of the sound is unparalleled and matches even the most premium Bose headphones. The most impressive fact is that the sound quality doesn’t fade with the increasing the volume. The distortion is also invisible, even when the sound is set extremely high. The headphones also have an impressive SPL level of the 113 dB and the frequency response of 18-22,000 Hz.

The Microphone

The microphone was built near the ear cup mounted controls. The microphone worked flawlessly when making calls, and video calls, also when giving the voice commands to the phone. The person who interacted on the other side received a high and crystal clear response, which is fairly expected from the Sennheiser HD 4.40 headphones. Its frequency response is between 100 – 10,000 Hz, which means that the microphone successfully eliminates the background sound and ambient in order, to ensure the crystal-clear communication.

Value for the Price

The Sennheiser HD 4.40 BT provides an outstanding performance and puts itself in the class with the best headphones available in the market. However, the price will discourage the Sennheiser fans with the tight budget. It still represents one of the better models, which are available for less than $150. The HD 4.40 BT model has a great aesthetic, impeccable sound quality, and a lot of useful features, but it wouldn’t hurt if they would be around $20 cheaper.

Alternatives of Sennheiser HD 4.40 BT

Here is a list of similar headphones which can be replaced with Sennheiser HD 4.40 BT:

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We have a complete review of BOHM B76 Wireless Active Noise Cancelling Headphone. It worth to have a look.

The good and bad about the Sennheiser HD 4.40 BT

There are no perfect headphones on the market. A lot of great features don’t necessarily mean fewer downfalls. The Sennheiser HD 4.40 comes with a lot of great things packed in them. But, unfortunately, there are a few drawbacks that are worth the mention.


  • Stylish
  • Bluetooth and NFC connectivity
  • APT-X
  • 25 hours Battery
  • Great Sound


  • Expensive

Final Verdict

The Sennheiser HD 4.40 BT is a premium headphone.

Despite the expensive price tag, they are a well-worth buy with a lot of handy features and the excellent quality of sound. If you wish for an active noise cancellation packed in your headphones, the Sennheiser HD 4.50 BTNC is the right option for you (Check our review of HD 4.50 BTNC), while keeping all the features and lasting quality from the Sennheiser HD 4.40 headphone.

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