To feel spaciousness in sound, Sennheiser Momentum 4 . Bluetooth wireless headphones


Bluetooth technology has brought us a lot of convenience. Line-free freedom overcame limitations of space and portability, and created a consumer trend that sought convenience rather than the essence of the device.

However, consumers accustomed to convenience are now demanding the next change, and several changes are being attempted.

Headphones, which are analog devices that adopt Bluetooth technology, attempt to change their essence beyond portability and convenience.

The Momentum 4, the latest model in the Momentum series, Sennheiser’s analog wireless headphones, is officially released. Today I would like to talk about the consequences of changing Sennheiser Momentum 4.

Sennheiser Momentum 4, what has changed?


Sennheiser’s wireless headphones, the Momentum series, have been well received in terms of comfort and portability.

The tone and sound quality rating was satisfactory overall and responded well to technological changes in the headphone market by adding Active Noise Cancellation (ANC) and Clear Hearing mode.

If there’s one noticeable change in the Momentum 4 released by Sennheisa, I’d say it’s a change in battery life, Bluetooth codec, and design.


Among them, the most striking visual change is that all models have been changed from headband to left and right units.

The height of the left and right units can be adjusted using the headband like a normal helmet, and the angle of the unit can be adjusted forward. Although this framework is not new, it is a widely used and proven method, so it may be preferred over the current method, which is my preferred method.

Alternatively, it’s impossible to fold the headset inwards like in the previous model, so the current method might be better for the same portability.

The headband’s soft inner cushion has a stronger rubbery feel than leather, so it feels a bit cheap, but the overall feel isn’t bad as the headband is finished with a fabric cover.



The design of the left and right headphones is also something I’ve seen a lot, so it doesn’t look particularly special, but I found it a little special because the shape of the inner ear cushion increases space and keeps it parallel to the ear.

This structure is very popular in the hi-fi headphone market, and the front of the headphone is designed thinner than the back. It would have been easier for Sennheiser to adopt this method, but the ear cups are angled inside the device without the thickness being as different as before, so the same effect can be expected as a result.

This structure is useful for sound insulation and can produce a more intense sound.


Changes no less significant than external changes have also been confirmed. Firstly, the usage time, which is at the heart of wireless Bluetooth headphones, has been extended to 60 hours, which is a really surprising change from the previous model, which was 17 hours.

Of course, the default of 60 hours doesn’t always guarantee that time, so actual usage time should be less than that, but that’s a surprising change given the difference between 5 and 60 hours.


One change that would be just as welcome as battery life is the change to the Bluetooth codec. The previous generation also paid attention to the Bluetooth codec, therefore it was able to support the latest codecs called aptX and aptX LL, but now the more advanced codec called aptX Adaptive is dominant.

In response to these changes, Sennheiser implemented aptX Adaptive on the Momentum 4, which allowed it to deliver better sound quality.

For reference, aptX Adaptive is a codec that combines aptX, aptX HD and aptX LL into one. It can compress and transmit audio data up to 24-bit at 96 kHz, which is used for high-resolution audio sources, so you can enjoy better audio quality compared to aptX, which was limited to 16-bit at 48kHz.

Of course, to properly support aptX Adaptive, the source device must also support it, and the current aptX HD-capable device is limited to a 24-bit 48kHz sample rate.

How does the Sennheiser Momentum 4 sound?


The sound of the Sennheiser Momentum 4 can be said in terms of space and layers.

It’s a little surprising that you can experience the distinction between space and sound in wireless headphones at this price, but you’ll definitely think the same as me before discussing the right or wrong balance of tones.

The limited space of a typical closed-back headphone is the same, but the position of each instrument or audio is different inside, and you will feel the sound live.

The sounds don’t sound a bit close, but the overall space isn’t wide enough, so it can’t be avoided. Instead, the space is not a form pushed from side to side or front to back, so it is possible to accept the feeling.

Overall color balance seems to be slightly improved at lower levels. However, it doesn’t sound as convincing as if it were a movie, but the extremely low strip size is a bit excessive; therefore, depending on the sound source, you may find a sound that does not suit you.

In this case, you can slightly adjust the EQ element in the Sennheiser Smart Control app that controls the Momentum 4, but if you lower the bass part by one space (-1dB), this sensation disappears.

If you want to adjust the overall tonal balance as well as the ultra low range, you can use the audio check feature. that suits your taste.

There is actually no need to use this function as only the bass, mid and treble items in the EQ menu are adjusted in terms of score. The base tone is well established, so you can use it without too much trouble if you set the range a bit too low.

Personally, I liked the bass at -1dB and the treble at 2dB, in which case we feel a little more the texture of the voices. There isn’t much of a tingling sensation called hissing.

However, the process called aging and burn-in is the result of listening after play, so the sound you hear when you buy a Sennheiser Momentum 4 may be different. For the battery and runtime test, I frequently played the audio source used in the test while pairing the Momentum 4 to my PC.

Sennheiser ANC, Momentum 4 more advanced?


To be honest, I haven’t used Momentum 3, so I don’t know how much better it is compared to the previous generation. However, compared to the Momentum 4 alone, the ANC was better than expected, and this feature was not felt to have a negative impact on sound quality or voice tone.

I felt that the sound with the higher frequency range was filtered out a bit and I couldn’t feel any sound while the sound source was playing.

If the sound source is not turned on, the feeling of filtering is less, but simply does not know if a person with a lower pitch is singing from the seat next to him.

However, you might be a little disappointed if you’re anticipating the end of ANC, where you can still hear loud banging, the table snapping your fingernails, or the sound of plastic bags crinkling. If the fan is turned on indoors, the sound of the wind passing through your ears will not be completely filtered out.

For reference, I briefly heard of a competitor product to the Momentum 4, and I believe that the ANC of this product was higher than that of the Momentum 4.

60 hours of continuous use, is that really possible?


Sennheiser offers the Momentum 4’s 700mAh battery capacity, but other companies haven’t properly disclosed it. So we can’t compare battery life or power efficiency based on capacity alone, and we have no choice but to check that the manufacturer meets the suggested time.

To verify this, I paired the Sennheiser Momentum 4 to a computer and played multiple FLAC audio sources frequently with the Fubar2000.

Of course, the Momentum 4 started at 100%, and when the battery ran out, the actual battery usage time was calculated by checking the log, paying attention that the audio material changes with the pairing trigger.


The result is as shown in the image above. Paired at 14:02:48 on August 11 and August 13 at 10:00 p.m., except other audio devices (if the PS5 DualSense card is connected, the microphone will be recognized and the register value added) on the twelfth Unpairing is confirmed at 44:29.

If you calculate that result over time, you get 56 hours 41 minutes and 41 seconds, which is less than Sennheiser’s suggested 60 hours, but that’s arguably quite a long battery life that hasn’t been tested with it yet. Bluetooth headphones. .

For reference, the 60 hours suggested by Sennheiser is measured by listening to music while connected to an iPhone.

Sennheiser Momentum 4, all good except Santi


I thought Bluetooth headphones are also needed. Even if the comfort and portability are good, if the sound core is not good, there is no need to buy it. For this reason, I was more interested in wired headphones than Bluetooth, but after trying the Sennheiser Momentum 4 I changed my mind.

In fact, it is also true that the Bluetooth earphones from the M company, released before the Sennheiser Momentum 4, were quite good. However, given that the Momentum 4, which is half the price or cheaper, looks like this, I have no choice but to change my mind about Bluetooth headphones.

With aptX Adaptive, this product compensates for the lack of sound quality and presents a clear balance between tone and space division that everyone can please.


To point out the disadvantages of the Momentum 4, the low cost of plastic? Enough said. Excess can be a disadvantage, but it’s not a big deal, and some people may prefer it according to different tastes, so it’s hard to consider it a disadvantage. .

Although omitted from the description above, it can be a good choice for gaming headset and audio quality as the latency is very low so as not to interfere with gameplay even when connected via aptX HD instead aptX LL or aptX adaptive.

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