The Sennheiser HD 4.40 are okay mixed usage over-ear headphones that can be used for a variety of use cases. They don’t excel in any usage but can be very versatile. Their sound is decent, and you also have a great EQ that lets you customize it to your liking. Unfortunately, they lack an ANC feature to be a good option for commuting, unlike the Sennheiser HD 4.50 BTNC. On the upside, they have low latency for Bluetooth headphones, so most people might not notice the delay when watching video content. They're a good option if you’re looking for headphones that can do a bit of everything without breaking the bank.
Okay for mixed usage. They have decent sound and you can EQ them to your liking as well. However, they don’t have an ANC feature like the HD 4.50 or PXC 550, which makes them a bit less versatile for commuting and to use at the office. While they are stable, they won’t be the best option for sports due to their bulky design. Their latency also might be too high for watching videos, and some will notice a delay. Their microphone is mediocre at best for online gaming, and latency issues will be noticeable with video games.
Decent for neutral listening. The Sennheiser 4.40 have a good, powerful, and extended bass, a well-balanced and accurate mid-range, but an underemphasized treble range that lacks in detail. Also, their bass is slightly thumpy, which some may like, but is also inconsistent across different users. Overall, these headphones will be suitable for a wide variety of music genres, but they have a slightly darker sound overall, and vocals and cymbals will sound a bit bland. On the upside, they have a good EQ, which lets you customize their sound to your preference.
Passable for commuting. The Sennheiser HD 4.40 aren’t the most portable headphones and they lack an ANC feature like similar Sennheiser models. They don’t isolate at all against lower frequency noises like engine rumbles. On the upside, you’ll be able to use them during the longest flights, as they have a great 29-hour battery life.
Okay for sports. The headphones feel secure and stable on the head for jogging, but they are noticeably less tight than the Sennheiser HD 4.50. Also, their bulky over-ear design won’t be ideal, as it traps heat under the ear cups, and they aren’t very portable. Their control scheme also isn’t the best, and might be hard to use during exercising.
Okay for the office. These headphones passively isolate well against A/C noise and do a decent job against ambient chatter, especially if you're playing a bit of music. They also don’t leak too much, so you’ll be able to block more noise by raising your volume without disturbing your surrounding colleagues. Additionally, their great battery life will last you longer than a full workday, but some might need to take a break because their headband lacks padding.
Mediocre at best for gaming. Playing video games over Bluetooth is not ideal, even with latency that is lower than most Bluetooth headphones. Also, their microphone is mediocre and won’t be suited for talking with friends and teammates online.
The Sennheiser HD 4.40 BT look fairly similar to the Sennheiser HD 4.50, but they don’t have silver accents on the ear cups and headband, which makes them stand out a bit less. They are fairly low-profile over-ears and don’t have a very flashy design. The padding is decently thick on the ear cups, but there’s not much on the headband. The dark matte finish gives the headphones a high-end look but might feel a bit plasticky once in your hands.
The Sennheiser HD 4.40 are decently comfortable and have good padding on the ear cups. They feel a bit softer than the Sennheiser HD 4.50, but they are noticeably less tight, which people may prefer. The headphones are lightweight and don’t apply too much pressure on the head, which is good since the headband isn’t well-padded. Also, the cups are fairly small and shallow and might not be very comfortable for people with bigger ears. These headphones might get uncomfortable for long listening sessions.
The HD 4.40 BT don’t have the best control scheme and have similar flaws to the Sennheiser HD 4.50. The buttons are the same, and they feel cramped and unresponsive at times. You get call/music management, track skipping, and volume controls, which are common. However, the track-skipping switch also acts as a button to play/pause, so it feels very mushy and feedback is poor. On the upside, the volume rocker is good, but you get an audio queue for each volume change, which can get annoying.
The Sennheiser HD 4.40 are not very breathable. They have a tight fit and a decent seal around your ears which obstruct a good amount of airflow. They should be okay for casual listening and most use cases, but will make your ears sweat during more demanding activities like running and exercising.
The HD 4.40 BT are not the most portable over-ear headphones, but they can fold into a more portable format, which takes less space. However, the cups don’t swivel to lay flat, which would make them easier to slide in a bag or to wear around the neck.
These headphones come with a soft pouch that protects the headphones from small scratches but won’t protect against water exposure and physical damage if they are dropped. On the upside, the pouch doesn’t add bulk to the design.
The HD 4.40 and 4.50 are built the same way. They are lightweight but feel fairly durable. The cups feel dense and should survive a few accidental drops. However, the headband isn’t reinforced by a metal sheet like the higher-end Sennheiser PXC 550 Wireless. Overall, they feel a bit plasticky, but they don’t feel too cheaply made.
The Sennheiser HD 4.40 are stable enough for you to run with, but they still won’t be the best option for exercising or intense sports due to their bulky over-ear design. They aren’t as tight as the HD 4.50 and fall off your head more easily. On the upside, the wireless design also ensures that the headphones won't be yanked off your head, as there's no cable to get hooked on anything.
The HD 4.40 BT have a mediocre frequency response consistency performance. These headphones are prone to consistency issues, especially in the bass range. The maximum variance measured across our five human subjects was about 8dB at 20Hz, which is noticeable. We also noticed that certain types of glasses could break the seal on these headphones and cause a drop in bass. In the treble range, they delivered fairly consistently but might be a bit sensitive to positioning.
The Sennheiser HD 4.40 have excellent bass. LFE (low-frequency extension) is at 10Hz, which is excellent. Low-bass, responsible for thump and rumble, is overemphasized by almost 4dB, which adds a noticeable excess of thumpiness to the bass, but some may prefer this. Mid-bass, responsible for the body of bass guitars and the punch of the kick drums, is also overemphasized by more than 2dB. There’s also a small dip in high-bass, which results in a slight loss in warmth.
Also, their bass delivery varies noticeably across users, and is sensitive to the quality of fit, seal, and whether you wear glasses. The response here represents the average bass response, so your experience may vary.
The mid-range is great. There’s a small dip in low-mid as a continuation of the high-bass, which makes the vocals slightly thin. However, low-mid and mid-mid are well-balanced and within 1.5dB of our target. This is important for clear reproduction of vocals and lead instruments. High-mid, however, is over our target by more than 2dB, bringing a bit of excess intensity and projection to vocals/leads.
Like the Sennheiser HD 4.50, the HD 4.40 BT’s treble range is mediocre. The response throughout the range is fairly uneven and very underemphasized. The dips centered around 4.5kHz and 7.5kHz have a negative effect on the clarity and presence of vocals, leads, and cymbals.
The Sennheiser HD 4.40 have good imaging. Weighted group delay is at 0.35, which is good. The GD graph also shows that the group delay response is entirely below the audibility threshold. This results in a tight bass and a transparent treble reproduction. Additionally, the L/R drivers of our test unit were well-matched in frequency, amplitude, and phase response, ensuring accurate placement and localization of objects (voices, instruments, and video game effects) in the stereo field. However, these results are only valid for our unit and yours may perform differently.
The Sennheiser HD 4.40 BT have a sub-par soundstage. The PRTF graph shows an inadequate amount of pinna activation with low accuracy, and there's no notch present in the 10kHz area either. This suggests a soundstage that will be perceived as small and located inside the listener's head as opposed to in front. Also, since they are closed-back headphones, their soundstage will be perceived as less open-sounding than that of open-back headphones.
Their noise isolation performance is poor. Since they don’t have an active noise cancelling system, they don’t isolate against low-frequency noises like the rumble of airplanes and bus engines. In the mid-range, important for blocking out speech, they reduce outside noise by more than 10dB, which is okay. In the treble range, occupied by sharp S and T sounds and A/C noises, they isolate by over 31dB, which is good.
The leakage performance of the HD 4.40 BT is good. The significant portion of their leakage is between 450Hz and 2.5KHz, which is not too broad. However, the overall level of leakage is very low. With the music at 100dB SPL, the leakage at 1 foot away averages at about 35dB SPL and peaks at 45dB SPL, which is slightly quieter than the noise floor of an average office.
The recording quality of the mic is sub-par. The LFE of 306Hz results in a recorded/transmitted speech that sound relatively thin. The HFE is at 3.3kHz, making speech noticeably muffled and lacking detail. The response between the LFE and HFE points is quite uneven, suggesting an unnatural speech transmission.
The integrated microphone of the HD 4.40 is decent at noise handling. It achieved a speech-to-noise ratio of 20dB in our SpNR test. This means it will be able to fully separate speech from ambient noise in moderately loud environments but will struggle in loud places like a subway station.
The HD 4.40 BT have a great 29-hour battery life. This will be more than enough for a normal workday, and you won’t have to charge them often. When you do, they only take about 2 hours to fully charge. Unfortunately, they don’t have a power saving feature, so be sure to turn them off when not using them. On the upside, you can use them passively with an audio cable even if the battery is dead, which is convenient. For an even longer battery life, take a look at the JBL Live 500BT.
Unfortunately, the Sennheiser companion app for these headphones, known as CapTune, is no longer available. The replacement app, Sennheiser Smart Control, isn't compatible. If you still have CapTune on your phone it will continue to function, but it's no longer possible to download it.
These headphones are Bluetooth compatible. While they can’t connect to two devices simultaneously, they support NFC for a quicker and easier pairing procedure. If you really care about multi-device support, then consider the Sennheiser HD 4.50 BTNC instead.
The latency of the HD 4.40 is good for Bluetooth headphones, which normally average around 200-220ms of delay. However, this will still not be optimal for watching videos and gaming. On the other hand, they support the aptX codec, which may give you an overall better performance and slightly lower latency, provided you have the right dongle/transmitter. Also, some apps and devices offer some sort of compensation, so you might not even notice the delay that much.
You can use the included 1/8” TRS audio cable to use these headphones passively on pretty much any platform that has a headphone jack. However, their cable does not have an in-line microphone.
The Sennheiser HD 4.40 are decent mixed-usage headphones that set themselves apart by their amazing wireless range and low latency, which makes them more suitable to watch video content than most Bluetooth headphones. However, they don’t have a great isolation performance, since they lack an ANC feature like other similar Sennheiser models. If you’re looking for ANC headphones for your commute, take a look at our recommendations for the best headphones, the best noise cancelling headphones and the best over-ear wireless headphones.
The Sennheiser HD 4.40 BT might be a better option than the JBL E55BT for most users, thanks to its nice app that allows you to EQ the sound of the headphones to your liking. They also have very low latency for Bluetooth headphones and have a few more hours of battery life. On the other hand, the JBLs are slightly more comfortable and can be paired with two devices simultaneously. They also come with a cable that has an in-line microphone, which the HD 4.40 lacks.
The Sony WH-CH700N are slightly better headphones than the Sennheiser HD 4.40 BT. They have a great audio reproduction and have over 30 hours of battery life. Their control scheme is noticeably easier to use, and they have an ANC feature, though it doesn’t seem to isolate against ambient noise that well. The Sony app is also great and offers multiple controls and customization. On the other hand, the Sennheiser headphones have low latency for Bluetooth and take noticeably less time to charge. However, they won’t be as comfortable as the WH-CH700N.
The JBL Live 500BT have a very small edge over the Sennheiser HD 4.40 BT Wireless. They feel slightly better-built and less plasticky, and their sound quality is slightly better as it doesn’t lack as much detail in the treble range as the HD 4.40. You also get about 10 extra hours of battery life with the Live 500BT. Their audio cable also features an in-line microphone, which the Sennheisers are lacking. However, the HD 4.40 support NFC pairing and have lower latency, which is better suited for watching video content without any delay.
The Sennheiser HD 4.40 BT Wireless are better mixed-usage headphones than the Skullcandy Hesh 3 Wireless, thanks to their app that gives you access to a good EQ. The Sennheiser also have less latency, which is good for watching videos. Other than that, they are similarly performing headphones; they even have a very similar look. The Skullcandy might be a better choice for you if you like bass-heavy genres.
The Sennheiser HD 4.50 are more versatile headphones than the Sennheiser HD 4.40 BT due to their ANC feature, which makes them suitable for commuting and at the office. Other than that, these two models are practically the same and perform quite similarly. The HD 4.40 are a bit less tight on some heads, which can be more comfortable for people with bigger heads.
The JBL TUNE 750BTNC Wireless are slightly better headphones for mixed usage than the Sennheiser HD 4.40 BT Wireless. The JBL have a better control scheme and have a better-balanced sound profile that's more consistent among various users. They also have ANC which helps them block out a bit more background noise than the Sennheiser. On the other hand, the Sennheiser last much longer off a single charge, are more comfortable, and look and feel more durable.