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Reviewed on Apr 18, 2019 , Jake Thauvette, Marc Henney, Sam Vafaei, Yannick Khong

Logitech G635 Gaming Headset
HEADPHONES REVIEW

Usage Ratings - Version 1.2

Test Benches:

  • 1.2: Winter 2018
  • 1.1: Summer 2017
  • 1.0: Winter 2017
  • 0.9: Winter 2016
6.5
Mixed Usage
What it is: This is the combination of the different use cases to evaluate how versatile the headphones are. Therefore an everyday headphone should be well-rounded enough to adapt to most situations and environments without significant losses in sound quality, design ergonomics or isolation.
Score components:
8.0
Critical Listening
What it is: The level of audio fidelity a headphone can reproduce. Therefore a balanced and true representation of bass, mids, treble, soundstage and imaging, as well as a comfortable listening experience, is essential for critical listening.
Score components:
5.5
Commute/Travel
What it is: How well the headphones handle the loud environments involved in commuting or traveling. Therefore your listening experience should be comfortable, hassle-free and as isolated from noise as possible.
5.8
Sports/Fitness
What it is: How well-adapted the headphones are, to use while doing sports or strenuous exercise. Therefore the headphones should not be too cumbersome and deliver a stable and comfortable listening experience.
6.1
Office
What it is: How well the headphones can deliver a comfortable and isolated listening experience in an office-like environment. They should not leak much and should block the noise of a busy office.
7.3
Gaming
Type : Over-ear
Enclosure : Closed-Back
Wireless : No
Noise-Cancelling : No
Mic : Yes
Transducer : Dynamic

The Logitech G635 are decent gaming headphones that have a great sound quality. Their wired connection is versatile and can be used with all platforms, which is convenient. They are comfortable, but their design is fairly bulky and doesn’t isolate any noise. Their microphone is also slightly bright, but people should still hear you clearly. On the upside, their companion software offers plenty of controls and customization options and it is one of the most complete and useful gaming apps we’ve seen so far.

Test Results
Design 6.6
Sound 8.1
Isolation 4.6
Microphone 6.8
Active Features 9.0
Connectivity 5.8
Pros
  • Great audio reproduction.
  • Amazing app support.
  • Comfortable and durable build.
Cons
  • Very bulky design.
  • Poor isolation performance.
  • Sound delivery varies significantly across different users. Sensitive to glasses.

Check Price

6.6

Design

Score components:

The Logitech G635 have a very gamer-centric look with a futuristic feel, but their overall design is very bulky. This headset is the wired variant of the wireless Logitech G935. These gaming headphones are comfortable to wear during playing sessions but are very tight on the head, which can be uncomfortable for some. They trap a good amount of heat inside the ear cups and aren’t very portable. On the upside, you have access to great gaming controls and mappable buttons. They can also be used on pretty much any platform, thanks to their 1/8” and USB cables.

Style

The Logitech G635 are very similar in design to the Logitech G935, except they are wired. Both these are new models from the previous Logitech G633 and Logitech G933. Their overall look is still the same, with a bulky design that shows without a doubt that they are gaming headphones. They are not very outdoor-friendly, and when powered by their USB cable, you get RGB lighting on the logo and a strip at the back of the ear cups. Their cups are large and more squared than most other gaming brands. You can also fold the microphone in to hide it, but they still won’t be great to use outside, even if you can use them with your phone.

7.5 Comfort
What it is: Adjustability and degrees of freedom, pressure, stiffness and weight.
When it matters: When the headphones are going to be used for long durations.
Score components: Subjectively assigned
Weight : 0.77 lbs
Clamping Force
What it is: The force that the headphones exert on your head, once you have them on. This is purely a measurement of the force applied, which does not take into account the earpad's surface area and the resulting pressure you will feel, on or around your ears.
When it matters: The tighter the headphones, the more force they put on your head. This can get uncomfortable or cause pain and soreness during long listening sessions.
:
1.5 lbs

The G635 are comfortable gaming headphones, but they are one of the tightest headsets we’ve reviewed so far. The padding on this model is made from a breathable mesh and feels soft on the skin. The cups are large and spacious and should fit most ear sizes and shapes. They are comfortable to wear for a while, but if you have a larger sized head, these could become uncomfortable rather quickly.

6.2 Controls
What it is: The control scheme of the headphones, the number of functions provided, button layout and ergonomics as well as the quality of tactile feedback.
When it matters: If you want to control volume, pause your music or make phone calls without directly interacting with your audio device.
Ease of use : Decent
Feedback : Great
Call/Music Control : No
Volume Control : Yes
Microphone Control : Yes
Channel Mixing
What it is: Being able to mix audio channels directly on the headphones.
When it matters: This is most useful when using a separate chat software so that you can mix in-game audio and chat audio depending on your needs.
:
No
Noise Canceling Control : N/A
Talk-Through
What it is: A transparency feature that uses the mics of the headphones to let you hear what is doing on around you without removing them.
When it matters: If you want to be aware of what is going on around you without removing your headphones or while still listening to your audio. This is typically a feature for the noise canceling headphones and passively isolating in-ears that block a lot of noise.
Good value: Yes or adjustable.
:
N/A
Additional Buttons : Presets

The Logitech G635 have a great control scheme for gamers. You have access to a volume wheel, a mic-mute button, and three mappable buttons that you can set to practically whatever you want inside their app. You also get a switch to choose between when you’re using the headset with a 1/8” connector or with the USB connector. The buttons offer great feedback and the ridges make it easier to distinguish different buttons, but it might take you a second to feel the surrounding buttons to be sure of which one you are about to press.

6.1 Breathability
What it is: How hot the headphones get when you wear them for an extended period of time.
When it matters: If you often have long listening sessions or use your headphones while doing physical activities like running or working out.
Score components:
Avg.Temp.Difference : 6.8 C

Even if the padding is made from a porous and mesh-like fabric, these headphones are not breathable. They are quite tight on the head and create a good seal around your ears, which means they trap a lot of heat inside the ear cups and don’t allow for much airflow. They won’t be suitable for sports as you’d sweat more than usual, and they weren't designed for this use case.

5.5 Portability
What it is: The volume of space occupied by the headphones when folded into their most compact format.
When it matters: If you're often on the move and need to carry your headphones in a bag, purse , or pocket.
Score components:
L : 8.0 "
W : 7.4 "
H : 3.1 "
Volume : 184 Cu. Inches
Transmitter required : N/A

Like most gaming headsets, especially Logitech ones, the G635 is not very portable. The cups are quite large and the overall build is very bulky. The cups don’t fold into a more portable format, but you can swivel them to make the headset lay flat, which is easier to slide in a bag. Overall, these gaming headphones should stay around your gaming setup and won’t be ideal to use on-the-go.

0 Case
What it is: The provided carrying options to protect your headphones when transporting them.
When it matters: To prevent damaging your headphones, if you often carry them in your bag or pocket.
Score components: Subjectively assigned
Type : N/A
L : N/A
W : N/A
H : N/A
Volume : N/A

They don’t come with a case or traveling pouch to protect them.

7.5 Build Quality
What it is: Durability, material quality, cheap/expensive feel.
When it matters: When the headphones are going to be used by multiple users (classes/studios), by children, in tough conditions, on a daily basis, or for exercise.
Score components: Subjectively assigned

There doesn’t seem to be any real improvement in durability from the G633 and G933 when it comes to build quality. These headphones are still well-built but are slightly plasticky. They also squeak a bit when manipulated. On the upside, the headband is flexible, yet sturdy thanks to a reinforcing metal frame. The cups are quite dense and the backplates are magnetic and easily removable. However, this isn't as useful as the G935 since there's no need for storage space for a wireless dongle. You can also fold the microphone in when you’re not using it, which is nice. You can use either a USB or a 1/8” cable, which means both are replaceable if ever they get damaged.

6.0 Stability
What it is: How the headphones are designed to prevent them from slipping off your ears or falling off your head.
When it matters: If you plan on using the headphones while doing sports or other physical activities that requires a lot of movement.
Score components: Subjectively assigned

These headphones are fairly tight on the head but sway around quite a bit with head movements. They won’t be ideal for sports activities, but this shouldn’t be a problem during a casual gaming session. However, be careful not to get the cable stuck or hooked on something, as it could yank the headphones off your head before detaching itself.

Cable
Detachable : Yes
Length : 5.3 ft
Connection : 1/8" TRRS

These gaming headphones can be used with a 1/8” TRRS cable or a USB cable, which must be used to get access to the Logitech G Hub software on PC.

Top
Headshots 1
Headshots 2
8.1

Sound

What it is: How accurately the audio is reproduced. The tests are performed with the headphones' most commonly used features enabled (noise-cancelling, wireless, etc.)

The Logitech G635 are great-sounding gaming headphones. Their bass is extended and accurate, their mid-range is well-balanced and flat, and their treble is virtually flawless. However, their frequency response consistency is sub-par, which means they’ll perform differently on different users. Overall, these headphones are very versatile and will be suited for all music genres and will be great to reproduce video game effects as well.

8.9 Bass
What it is: Frequency Response from 20Hz-250Hz
When it matters: When the material is heavy on bass frequencies, such as those of kick drums and bass guitar.
Score components:
Std. Err.
What it is: The amount of deviation (weighted standard error) in bass frequency response (20Hz-250Hz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) bass performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
1.62 dB
Low-Frequency Extension
What it is: The lowest frequency at which the frequency response reaches -3dB of the target response.
When it matters: Shows how extended the bass is.
Good value: <40Hz
Noticeable difference: 5Hz
:
10 Hz
Low-Bass
What it is: The average amount of over/under-emphasis in frequency response from 20Hz-60Hz.
When it matters: Kick drums and low frequency effects get their 'thump' from this range. Mostly felt than heard.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
1.65 dB
Mid-Bass
What it is: The average amount of over/under-emphasis in frequency response from 60Hz-120Hz.
When it matters: Melodic bass instruments have most of their fundamental frequencies in this range. This is where the 'body' and 'punch' of the bass sits.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
1.36 dB
High-Bass
What it is: The average amount of over/under-emphasis in frequency response from 120Hz-250Hz.
When it matters: Most instruments get their warmth and full-ness from this range. When over-emphasized, mixes tend to get muddy and boomy.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
2.16 dB

The G635 have an excellent bass range performance. LFE is extended down to 10Hz, which is great. The entire range's response is virtually flat and within 2dB of our target, which is good. Also, their bass delivery varies significantly across users, and is sensitive to the quality of fit, seal, and whether you wear glasses. The response here represents the average bass response and your experience may vary.

8.7 Mid
What it is: Frequency Response from 250Hz-2KHz
When it matters: When the material is heavy on mid-range frequencies. This is the case for the majority of audio content.
Score components:
Std. Err.
What it is: The amount of deviation (weighted standard error) in mid frequency response (250Hz-2.5KHz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) mid performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
1.75 dB
Low-Mid
What it is: The average amount of over/under-emphasis in frequency response from 250Hz-500Hz.
When it matters: Most instruments have their fundamentals or low harmonics in this range. Over-emphasis in this range sounds muddy and cluttered. Under-emphasis, thins out the vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
1.02 dB
Mid-Mid
What it is: The average amount of over/under-emphasis in frequency response from 500Hz-1KHz.
When it matters: This range is occupied mostly by upper harmonics. Over-emphasis sounds forward and boxy. Under-emphasis pushes instruments to the back of the mix.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-0.48 dB
High-Mid
What it is: The average amount of over/under-emphasis in frequency response from 1KHz-2KHz.
When it matters: Most instruments, especially vocals, get their intensity and clarity from this range. Over-emphasis sounds honky and harsh, under-emphasis sounds weak and distant.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-2.04 dB

The mid-range of the G635 is very good. The response throughout the range is well-balanced and flat, which means vocals and leads will be accurately reproduced. There is a small 5dB tilt favoring lower end frequencies that will muddy up the sound slightly, and will also decrease the intensity and projection of vocals/leads. However, this will be barely noticeable.

8.8 Treble
What it is: Frequency Response from 2KHz-20KHz
When it matters: When the material is heavy on high-range frequencies, such as voice, cymbals, and any other material where brightness, brilliance and airiness is desired.
Score components:
Std. Err.
What it is: The amount of deviation (weighted standard error) in treble frequency response (2.5KHz-20KHz) as compared to a target response that would sound perfectly balanced to most people.
When it matters: When a balanced and neutral (reference) treble performance is desired.
Good value: <4dB
Noticeable difference: 0.1dB
:
2.46 dB
Low-Treble
What it is: The average amount of over/under-emphasis in frequency response from 2KHz-5KHz.
When it matters: Almost all instruments rely on this range for their presence, detail, and articulation. Over-emphasis can sound harsh and painful. Under-emphasis hurts the comprehensibility of vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-0.1 dB
Mid-Treble
What it is: The average amount of over/under emphasis in frequency response from 5KHz-10KHz.
When it matters: This is the sibilance range. Cymbals, vocals, and lead instruments rely on this range for brightness and presence. Over-emphasis sounds piercing and painful, under-emphasis sounds dull and lispy.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
0.77 dB
High-Treble
What it is: The average amount of over/under-emphasis in frequency response from 10KHz-20KHz.
When it matters: This range gives brilliance and airiness to the sound. Over-emphasis sounds hissy, under-emphasis sounds closed-up and lifeless.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-5.39 dB

Their treble performance is also very good. The response is virtually flawless up to 8kHz but may lack a bit of detail and presence on frequencies after that mark. Also, their treble delivery varies noticeably across users. The response here represents the average response, and your experience may vary.

Raw Frequency Response
What it is: The average uncompensated frequency response of the headphone. For in-ears and earbuds, this corresponds to the average of 5 measurements/re-seats on the dummy head (HMS). For over/on-ear headphones, this corresponds to the average of 5 measurements/re-seats on the HMS (Head Measurement System) for the mid and treble ranges, and 5 measurements/re-seats on 5 human subjects for the bass range.
When it matters: This is for those who want to see the raw and uncompensated frequency response of the headphone. Some of the more advanced users, are able to read and evaluate headphone frequency response in its raw form and without compensation. This will be especially useful to them if they have their own headphone compensation/target curve, which may differ from the compensation curve/target response used by RTINGS.com.
5.3 Frequency Response Consistency
What it is: The amount of deviation of each frequency response pass, from the average frequency response.
When it matters: Shows how consistently the headphones perform after re-positioning them.
Score components:
Avg. Std. Deviation
What it is: The average amount of deviation in frequency response of 5 re-seats, from the average frequency response.
When it matters: Shows how consistently the headphones perform after re-positioning them.
Good value: <0.5
Noticeable difference: 0.1
:
1.37 dB

The Logitech G635 have sub-par frequency response consistency. In the bass range, we measured more than 16dB of maximum deviation at 20Hz, which is very noticeable. People with glasses may experience a drop in bass if they create a break in the seal of the headphones around your ears. Their treble consistency is also sub-par, with about 8dB of deviation measured around 2.8kHz; this may be due to the design of the cups.

8.3 Imaging
What it is: Imaging qualities are inherent to the audio content, the headphones have to 'reproduce' them rather than 'create' them. They determine how accurately the objects are positioned in the stereo image, and how transparent the imaging is.
When it matters: When accurate positioning of the objects in the stereo image, and clear and transparent imaging is desired.
Weighted Group Delay
What it is: The average amount of group delay calculated based on a perceptual weighting filter. Group delay indicates how long it takes for each frequency to reach their maximum amplitude. This is a monaural quality and can be perceived even with one ear.
When it matters: Headphones with lower group delay have more transparent imaging and a tighter bass. Headphones with higher group delay in the bass range tend to have a wimpy and loose bass, and headphones with higher group delay in the treble range tend to have a less transparent imaging.
Good value: <0.5
Noticeable difference: 0.1
:
0.21
Weighted Amplitude Mismatch
What it is: The Left/Right balance of our test unit, that is, the amount of amplitude difference between the left and right drivers. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When a properly balanced stereo image and low manufacturing tolerance is desired. A poor score indicates a noticeable difference in level between the left and right drivers.
Good value: <1.5
Noticeable difference: 0.1
:
0.42
Weighted Frequency Mismatch
What it is: The amount of difference (Std. Err.) between the frequency response of the left and right drivers of our test unit. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When an even and stable stereo image, as well as a low manufacturing tolerance, is desired. A poor score indicates there may be 'holes' in the stereo image at certain frequencies.
Good value: <2
Noticeable difference: 0.1
:
2.6
Weighted Phase Mismatch
What it is: The amount of difference (Std. Err.) between the phase response of the left and right drivers of our test unit. This is not a design test, but a marker for manufacturing tolerance and ergonomics.
When it matters: When an even and stable stereo image, as well as a low manufacturing tolerance is desired. A poor score indicates there may be inaccuracies in the stereo image reproduction at certain frequencies.
Good value: <16
Noticeable difference: 3
:
7.41

The imaging performance is great. Weighted group delay is at 0.21, which is very good, but the GD graph shows that the response crosses the audibility threshold around 50-60Hz. This could result in a bass that is a tad slow, but it's subtle enough that most people won't notice it. Additionally, the L/R drivers of our test unit were very well-matched in amplitude and phase response, with a slight frequency mismatch. This is important for the accurate localization and placement of objects (like voice, instruments, and video game effects) in the stereo field. However, these results are only valid for our unit and yours may perform differently.

6.7 Soundstage
What it is: Soundstage qualities are not inherent to the audio content, the headphones have to 'create' them rather than 'reproduce' them. They determine whether the sound is perceived to be coming from inside or in front of the head, how open and spacious the soundstage is, how much the headphones acoustically interact with the environment, and how strong the phantom center is.
When it matters: When an accurately produced, large and spacious soundstage, similar to that of a stereo loudspeaker setup is desired.
PRTF Accuracy (Std. Dev.)
What it is: The standard deviation of the PRTF (Pinna-related transfer function) of the headphones compared to a reference loudspeaker's PRTF at 30°. This quality is monaural and can be perceived even with one ear. This test does not apply to in-ears and earbuds, due to the lack of pinna interaction.
When it matters: An accurate pinna activation is mainly responsible for how natural and speaker-like the soundstage is perceived to be. The less error in the shape of the PRTF, the more natrual and speaker-like the perception of the soundstage will be. High amounts of error may indicate a soundstage that is unnatural or odd.
Good value: <2.5
Noticeable difference: 0.1
:
2.74 dB
PRTF Size (Avg.)
What it is: The average amplitude of the PRTF (Pinna-related transfer function) of the headphones compared to that of a reference loudspeaker's PRTF at 30°. This quality is monaural and can be perceived even with one ear. This test does not apply to in-ears and earbuds, due to the lack of pinna interaction.
When it matters: This value is responsible for the perceived size of the soundstage. The higher the value, the larger the perceived size of the soundstage. However, values above the reference (5.0dB) could result in a soundstage that is perceived as unnatural or odd.
Good value: >3.7
Noticeable difference: 0.1
:
7.3 dB
PRTF Distance
What it is: The depth of the "10KHz notch" of the headphone's PRTF, which is caused by phase cancellations at the concha. This quality is monaural and can be perceived even with one ear. This test does not apply to in-ears and earbuds, due to the lack of pinna interaction.
When it matters: This value is mainly responsible for the perceived distance and elevation of the soundstage. A small distance value may result in a soundstage that is perceived to be located inside the head. Larger values may help pull the soundstage out from inside of the head and bring it to the front.
Good value: >13
Noticeable difference: 1
:
12.68 dB
Openness
What it is: How open the headphones are, and how open and spacious they sound. This quality is monaural and can be perceived even with one ear. This test differentiates between acoustically and electronically produced crosstalk and only takes the acoustically generated crosstalk into account. This value is the inverse of the Noise Isolation test score, and could be indirectly related the acoustic impedance of the headphones.
When it matters: When a headphone with a sense of an open, and spacious soundstage is desired. A value of 10 indicates a fully open headphone, and a value of 0 indicates a fully closed headphone.
Good value: >7.5
Noticeable difference: 0.5
:
6.6
Acoustic Space Excitation
What it is: How loud the headphones are, and how much they excite their environment acoustically. If the headphones are loud and open enough, the sound leaking from the headphones will be affected by the environment (reflections/reverb) before reflecting back into the open headphones and to the listener's ears. This quality is monaural and can be perceived even with one ear. This value is the inverse of the Leakage test score.
When it matters: Headphones with higher excitation values, similar to openness, tend to have soundstages that are perceived as more open and spacious.
Good value: >7.5
Noticeable difference: 0.5
:
4.0
Correlated Crosstalk
What it is: How strong and solid the phantom center is. This is mostly a stereo quality and its effects on mono content are minimal. This test is sensitive to the phase of the crosstalk and whether it is produced acoustically or electronically.
When it matters: When a true reproduction of the stereo image is desired. A value of 0 indicates no crosstalk, or that the existing crosstalk is not correlated enough to affect the phantom center. A negative score means the crosstalk is out of phase with the original signal, resulting in a slightly wider stereo image at the expense of creating a 'hole' at the center of the stereo field. A positive score means the crosstalk is in phase and positively affecting the phantom center.
Good value: >1dB
Noticeable difference: 0.3dB
:
0.0 dB

The soundstage of the G635 is okay. The PRTF graph shows a good amount of pinna interaction and activation, which is good, but its accuracy isn’t great. There is also not a notch present around the 10kHz region, either. Therefore, their soundstage may be perceived as relatively large but unnatural and located inside the head. Their closed-back design also means they won’t be open-sounding as open-back headphones.

8.4 Total Harmonic Distortion
What it is: The subtle, unwanted frequencies (harmonics) produced alongside the intended frequencies.
When it matters: When clean and pure sound reproduction is desired, though its effect is not as noticable as frequency response.
Score components:
Weighted THD @ 90
What it is: The overall amount of harmonic distortion measured at 90dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: <0.100
Noticeable difference: 0.1
:
0.889
Weighted THD @ 100
What it is: The overall amount of harmonic distortion measured at 100dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at loud listening levels.
Good value: <0.300
Noticeable difference: 0.1
:
0.277

The harmonic distortion performance of the Logitech G635 is very good. The THD in the bass range is within good limits and doesn’t get too elevated in the mid and treble ranges. The peak around 2.3kHz could make these frequencies slightly harsh and impure. On the upside, there is no big jump in THD at 100 dB SPL, which could be due to the flexibility of the drivers under heavier loads or due to the noise floor of our testing.

4.6

Isolation

Score components:

The Logitech G635 don't block a lot of noise, so they won't be the ideal option if you game in a particularly loud environment. The slightly porous pads let noise seep into your audio, which may be bothersome if you're at a competitive event and need to focus on the multiplayer voice chat or in-game audio. Unfortunately, they're also a bit leaky at higher volumes, so they may be distracting to anyone next to you in quieter conditions. They won't be the ideal headphones to game at night without distracting your friend, roommate, or partner.

3.6 Noise Isolation
What it is: How much outside noise is blocked out by putting the headphones on.
When it matters: If the headphones are going to be used in a noisy environment (airplane, subway, etc.)
Score components:
Isolation Audio
What it is: The simulated noise isolation of the headphones, demonstrating how much outside noise is blocked out by putting the headphones on. This recording is created using an EQ and is not an actual recording. For headphones with ANC (active noise cancellation), the playback simulates the isolation with ANC enabled.
When it matters: When the headphones are going to be used in a noisy envinronment (airplane, subway, etc.)
:
Overall Attenuation
What it is: The overall amount of environmental noise reduction in dB.
When it matters: In loud envinronments like planes, trains, offices, etc.
Good value: <-20dB
Noticeable difference: 1dB
:
-9.36 dB
Bass
What it is: The overall amount of noise isolation in the bass range (20Hz-250Hz).
When it matters: When the outside noise is bass-heavy, like in airplanes.
Good value: <-15dB
Noticeable difference: 1dB
:
0.5 dB
Mid
What it is: The overall amount of noise isolation in the mid-range (250Hz-2.5KHz).
When it matters: When the environment's noise is mid-heavy, like in an office.
Good value: <-15dB
Noticeable difference: 1dB
:
-3.69 dB
Treble
What it is: The overall amount of noise isolation in the treble range (2.5KHz-20KHz).
When it matters: When the environment's noise is treble-heavy. Although uncommon, areas with sharp sounds fall under this category.
Good value: <-30dB
Noticeable difference: 1dB
:
-25.03 dB
Self-Noise
What it is: The amount of noise created by the active electronics of the headphones (if applicable), measured from 300Hz-20KHz. Applies mostly to wireless and noise-cancelling headphones.
When it matters: If too loud, it could become distracting when listening to quiet material like podcasts and audiobooks.
Good value: <16dB
Noticeable difference: 1dB
:
21.26 dB

Like most Logitech gaming headphones, the G635's isolation performance is poor. They don’t have a noise cancelling feature and only passively isolate. In the bass range, occupied by the rumble of airplane and bus engines, they achieve no isolation. In the mid-range, important for blocking out speech, they achieve about 4dB of isolation, which is barely noticeable. In the treble range, responsible for sharp sounds like S and Ts and A/C system noises, they isolate by 25dB, which is decent.

6.5 Leakage
What it is: The amount of sound bleeding out of the headphones.
When it matters: When the listener doesn't want people around them (in office, recording studio, etc.) to hear what is being listened to.
Score components:
Leakage Audio
What it is: The simulated sound leakage heard 1 foot away from the user, while the user is listening to a 100dB SPL signal. This recording is created using an EQ and is not an actual recording.
When it matters: When you don't want people to hear what you are listening to.
:
Overall Leakage @ 1ft
What it is: The amount of sound leakage heard 1 foot away from the user, while the user is listening to a 100dB SPL signal.
When it matters: When you don't want people hear what you are listening to.
Good value: <35dB
Noticeable difference: 1dB
:
42.27 dB

The Logitech G635 have an okay leakage performance. The significant portion of their leakage sits between 400Hz and 3kHz, which is a relatively broad range. The overall level of the leakage is a bit loud too. With the music at 100dB SPL, the leakage at 1 foot away averages at 42dB and peaks at around 58dB, which is a bit above the noise floor of most offices.

6.8

Microphone

What it is: The microphone section shows the quality of speech capture and transmission by the mic, as well as how well the microphone under test handles noisy environments.
When it matters: For your speech to be transmitted to and understood properly by the listener, the microphone needs to have a good recording quality. If the environment the microphone is being used in is noisy, a microphone with a good noise handling performance would be needed as well.
Score components:
Integrated
What it is: The microphone integrated in the ear cup or ear bud of a wireless headphone.
When it matters: For calls, gaming and voice over IP software or for any other use of the microphone.
Good value: Yes
:
No
In-line
What it is: The microphone inside the in-line remote of audio cables for wired and wireless headsets.
When it matters: In-line microphone are usually better than integrated mics. If you need better recording quality and noise handling for calls, gaming and voice over IP software then use the audio cable of your wired or wireless headphone if it has an inline microphone.
Good value: Yes
:
No
Boom
What it is: A typically better microphone, that's also adjustable and extends so that the mic is closer to your mouth.
When it matters: Much better recording quality and noise handling than in-line or integrated mics. Primarily used for gaming and voice over IP software.
Good value: Yes
:
Yes
Detachable Boom
What it is: A boom mic that is detachable from the headset.
When it matters: If you want to use your headphone outdoors without the bulk and hassle of the Boom mic.
:
No

The Logitech G635 have a decent boom mic. In quiet environments, speech recorded or transmitted with this microphone sounds natural and detailed, but also thin, bright, and slightly piercing. In noisy situations, it is able to separate speech from background noise to a decent degree, but might struggle a bit in extremely loud situations like a big gaming event.

6.2 Recording Quality
What it is: Microphone recording quality shows how natural, neutral, extended and intelligible speech would be with the device under test, in a quiet environment.
When it matters: A microphone with a good recording quality ensures that the person listening to you would hear a full, clear, and easily understandable speech. Therefore, it is important whenever a good quality of speech transmission and intelligibility is needed.
Score components:
Recorded Speech
What it is: Actual audio recording of the headphone's microphone, recorded while placed on the dummy head, with speech being played back through the dummy head's mouth simulator.
When it matters: When a clean, full, and intelligible speech transmission is required.
:
LFE
What it is: Low-frequency extension shows how deep the bass response of the microphone is, and therefore, how deep and full your voice would sound to the listener. It is the lowest frequency at which the frequency response reaches -3dB of the target response.
When it matters: LFE is not a big factor in speech intelligibility and even speech recorded with a mic that has an LFE of 500Hz could still be easily understood. Therefore, it is mostly important if you are concerned with how deep and full your voice would be heard.
Good value: <150Hz
Noticeable difference: 30Hz
:
507.97 Hz
FR Std. Dev.
What it is: Frequency Response Standard Deviation shows how accurately and balanced sound is captured by the microphone at each frequency. FR Std. Dev. is calculated between LFE and HFE, and the rest of the spectrum is ignored.
When it matters: A good frequency response is desired when a natural and neutral speech quality is desired. As opposed to HFE which is more a metric for speech intelligibility, frequency response could be considered as a metric for a natural and neutral sound.
Good value: >3.5dB
Noticeable difference: 0.5dB
:
3.08 dB
HFE
What it is: High-frequency extension is the highest frequency at which the frequency response reaches -3dB of the target response. It shows how extended the treble response of the microphone is.
When it matters: HFE is one the most important factors in speech intelligibility. The higher the HFE, the brighter, more open, and more extended the speech quality will be which makes it a lot easier to understand by the listener.
Good value: >8KHz
Noticeable difference: 1KHz
:
10093.19 Hz
Weighted THD
What it is: The unwanted frequencies (harmonics) produced alongside the intended frequencies, which cause deformation of an output signal compared to its input.
When it matters: When clean and pure sound reproduction is desired, though its effect is not as noticable as frequency response.
Good value: <1.5
Noticeable difference: 1.0
:
1.745
Gain
What it is: Shows how much louder the microphone can go above our reference loudness level. The gain value is reported relative to our reference level, which is 94dB at a distance of 5cm from the mouth.
When it matters: A microphone with a high gain is important when the input signal (speech) is very quiet. For example when whispering, or talking on the phone in a library.
Good value: >18dB
Noticeable difference: 3dB
:
10.91 dB

The Logitech G635’s boom mic has an okay recording quality. The LFE (low-frequency extension) of 508 Hz indicates a recorded/transmitted speech that sounds quite bright and thin. The HFE (high-frequency extension) is at 10kHz, which results in a full-bodied, clear, detailed speech. The response between the LFE and HFE points is quite flat, but gets elevated in the treble range, resulting in a natural voice that could be slightly sharp.

This microphone performs better than what the score shows since LFE might not as important for everyone. Overall, it definitely has better recording quality than most Bluetooth headphone microphones, which have a similar score but would sound less clear due to a lower HFE.

7.4 Noise Handling
What it is: How well the microphone is able to separate speech from background noise, so that the transmission would include more voice and less noise.
When it matters: When a clean and intelligible speech transmission is desired in a noisy situation like talking on the phone on a busy street or on the bus.
Score components:
Speech + Pink Noise :
Speech + Subway Noise :
SpNR
What it is: Speech to Noise Ratio is the difference in level between speech and background noise as heard by the listener
When it matters: If the microphone is going to be used in a noisy environment, it is important for it to be able to separate the speech from background noise, so the voice would be easily audible and understandable.
Good value: >24dB
Noticeable difference: 3dB
:
22.96 dB

The boom microphone of the Logitech G635 is decent at noise handling. It achieved a speech-to-noise ratio of 23dB in our SpNR test. This indicates that it can separate speech from ambient noise to a decent degree in most situations, but may not be suited for the loudest situations.

9.0

Active Features

What it is: Headphones with active components that require a battery. This includes noise cancelling and wireless headphones that actively reduce noise or transmit audio via a wireless connection.
When it matters: How suitable the power and wireless specifications of an active headphone will be, depending on your listening habits. The range and/or discharge time of the active headphone you select will be important if you're often on the move or have long uninterrupted listening sessions.
Score components:

The Logitech G635 is a wired headset that doesn’t have a battery. However, when plugged into a computer with the USB cable, you get access to the Logitech G Hub app, which offers tons of controls and customization options. This is one of the most complete and useful apps we’ve reviewed so far.

N/A Battery
What it is: The power source of your headphones. All headphones with active features have a battery that will deplete over time.
When it matters: To continue using the active features of your headphones. Some models lose features or switch off completely when the battery is drained, which limits what you can do with them until the next charge.
Battery Type
What it is: The type of battery that the headphones use. Usually AAA or embedded, Li-ion rechargeable batteries.
When it matters: When your headphones run out of power. Rechargeable batteries usually charge via the headphones Micro-USB port whereas AAA batteries have to be replaced or charged with an external device.
:
N/A
Battery Life
What it is: The amount of time it takes for a headphones' battery to be completely drained. Battery life will vary depending on the active features used and volume level.
When it matters: For active headphones that connect wirelessly, have noise cancellation or other audio-enhancing features, that cease to work once the battery is dead.
Good value: >10hrs
Noticeable difference: 0.5hrs
:
N/A
Charge Time
What it is: The amount of time your active headphones have to be connected to a power source to charge from 0 to a 100%. However, charging time will vary depending on your power source.
When it matters: To be able to use the active features of your headphones. Especially, wireless ones that completely switch off and need to be recharged when the battery is dead.
Good value: 2h or less
Noticeable difference: 0.25h
:
N/A
Power Saving Feature
What it is: A feature that turns off the headphones, after a set time, when they're not in use.
When it matters: To prolong battery life when the headphones are not being used, or if you forget to manually turn off your headphones.
:
N/A
Audio while charging
What it is: Some active headphones remain usable while charging. They continue to stream audio and do not disable other active features.
When it matters: This makes sure that your headphones's battery are not being drained when you're relatively close to a power source. However, this means wireless headphones will need a wired connection to the power source during the charging process.
:
N/A
Passive Playback
What it is: Active headphones that still work when all their active features are turned off or out of power.
When it matters: If you run out of power and do not have spare AA/AAA batteries or access to a power source to recharge your headphones.
:
N/A

These gaming headphones are wired and don’t have battery life. For a wireless headset, take a look at their wireless equivalent, the Logitech G935.

9.0 App Support
What it is: The additional app provided to enhance your listening experience. They typically deliver a set of practical features that give you more control over the sound, noise cancelling and effects that the headphones produce.
When it matters: An app with a lot of features allows you to customize your listening experience to suit your taste and preferences. For example, additions like an equalizer can give you more bass or treble and room effects can simulate a bigger Soundstage in closed back headphones.
Score components: Subjectively assigned
App Name : Logitech G Hub
iOS : No
Android : No
Mac OS : Yes
Windows : Yes
Equalizer
What it is: Parametric, graphic or preset sound profiles that slightly alter the frequency response.
When it matters: If you want to tailor, your listening experience. Depending on what you're listening to you may want more or less bass for some tracks or more mid-range for vocals-heavy audio.
:
Graphic + Presets
ANC control
What it is: Control over the Active noise canceling technology. This could be either a simple on/off button, and adjustable slider or even adaptive self-regulating noise cancellation.
When it matters: If you're in an environment where you need to monitor your surroundings or completely isolate yourself from ambient noise.
:
N/A
Mic Control : Yes
Room effects
What it is: Room effects that enhance the audio quality to make it more immersive.
When it matters: If you want to further tweak your listening experience. Adding room effects, can simulate a more spacious Soundstage or deliver a surround sound-like feel.
:
No
Playback control
What it is: An in-app player that gives you access to play/stop, track skipping or volume controls directly with the app.
When it matters: It's a shortcut that allows you to control your audio without leaving the application.
:
No
Button Mapping : Yes
Surround Sound : DTS 7.1

These gaming headphones are compatible with the new Logitech G Hub app available on Windows and Mac. This software is one of the most complete ones we’ve ever seen. It offers tons of customization options like surround sound, a 10-band EQ, and control over your Lightsync RGB lighting. You also get tons of options and control for the sound and microphone of the headset. You can map the buttons of the headphones to different sound profiles, functions, and commands related to your PC system settings. You can also launch programs, your favorite games, set macros, or even manage your music, which is very convenient. However, you only have three buttons to map.

5.8

Connectivity

What it is: The inputs and outputs of wired and wireless headphones, as well as their latency performance and range.
When it matters: When you want to know whether your headphones will be compatible with your various audio sources, like your smartphone, tablet, gaming consoles, PC, smart TV, amplifiers, etc.
Score components:

The Logitech G635 are wired gaming headphones that can’t be used wirelessly in any way. They are great for watching video content or gaming thanks to their wired connection which gives you no latency. They are very versatile since you can use them with a USB or a normal analog cable on pretty much every gaming platform. However, your range will be limited by their cables’ length.

0 Bluetooth
What it is: Bluetooth support for wireless headphones.
When it matters: When you want to connect your headphones wirelessly to a Bluetooth source, like your smartphone, tablet, PC or smart TV.
Score components:
Bluetooth Version
What it is: The version of Bluetooth that the headphones support.
When it matters: Newer versions of Bluetooth, when paired with devices that support the same version, may have improved latency and wireless range performance.
:
N/A
Multi-Device Pairing
What it is: A Bluetooth profile that allows some headphones to be simultaneously connected to multiple Bluetooth sources, and have full call and media support on both/all devices they are connected to.
When it matters: To quickly switch between your Bluetooth sources. For example, switching from your phone to your home or work PC and still have call and media support on both devices.
Good value: 2 devices.
:
N/A
NFC Pairing
What it is: Near Field Communication technology that allows you to quickly, pair your headphones with your Bluetooth and NFC-enabled device.
When it matters: This makes pairing with an NFC-enabled device a lot easier than the typical and often tedious hold-to-pair procedure that most wireless headphones have.
Good value: Yes
:
N/A

The G635 is not Bluetooth compatible. For a gaming headset with Bluetooth compatibility, check out the Turtle Beach Stealth 700, the Turtle Beach Elite 800, or the SteelSeries Arctis Pro Wireless.

10 Wired
What it is: The type and compatibility of audio cables for wired and wireless headphones.
When it matters: When you want to use your headphones wired with a device that has a regular audio jack (line-out), like a smartphone, PC, or gaming console controller.
OS Compatibility
What it is: Testing the headphones' cable to see which operating system it works with.
When it matters: Some wired headphones don't support all operating systems so this allows you to check if the headphones will work with your device.
:
Not OS specific
Analog Audio
What it is: When your headphones can play analog media using a standard 1/8" TRS audio jack. Includes using a 1/4" or 1/16" TRS with a 1/8" TRS adapter.
When it matters: For listening to music with devices that have a standard 1/8" TRS audio jack, like an MP3 player, tablet, smartphone or PC.
Good value: Yes
:
Yes
USB Audio
What it is: When your headphones can play digital media using a standard USB connector.
When it matters: For listening to music on a PC. A digital USB adapter can offer some advantages over a regular audio jack, like a DAC or added software support.
Good value: Yes
:
Yes
PS4 Compatible
What it is: PS4 compatibility with a regular 1/8" TRS or TRRS audio cable.
When it matters: When you want to use a wired headphone with your PS4 controller.
Good value: Audio + Microphone
:
Audio + Microphone
Xbox One Compatible
What it is: Xbox One compatibility with a regular 1/8" TRS or TRRS audio cable.
When it matters: When you want to use a wired headphone with your Xbox One controller.
Good value: Audio + Microphone
:
Audio + Microphone
PC Compatible
What it is: PC compatibility with a regular 1/8" TRS or TRRS audio cable.
When it matters: When you want to use a wired headphone with your PC.
Good value: Audio + Microphone
:
Audio + Microphone

These gaming headphones are compatible with every platform since they have both audio and microphone support over USB and analog connection. For PC and PS4, you can use both, but the USB one will be needed to get access to the G Hub app on PC. However, you can’t use the USB cable on Xbox and you’ll have to wire the headphones to the controller using the 1/8” TRRS cable.

0 Base/Dock
What it is: The base station, dock, or dongle transmitter of wireless headphones that receive data/audio via a specific frequency range or wired headphones that have a proprietary amp.
When it matters: When you need to know which inputs and outputs the headphones support, so you can set them up with your home theatre system for gaming or watching movies.
Type
What it is: The type of base/dock the headphones use, whether a USB dongle, charging case or docking station. Wired or wireless.
When it matters: Larger docking stations tend to have more controls and sometimes even customization options while smaller USB dongles are more portable. Charging cases allow you to keep your earbuds charged on-the-go.
:
N/A
Optical Input
What it is: Optical input for audio.
When it matters: Optical can carry a bit more data at faster speeds than typical wired connection which allows for more high quality, lossless audio.
Good value: Yes
:
N/A
Line In
What it is: The regular wired input via a 1/8" TRS audio jack.
When it matters: For any device that has a line out for audio transmission.
Good value: Yes
:
N/A
Line Out
What it is: A regular 1/8TRS audio jack output.
When it matters: If you need to share the audio source with other devices. A line out lets you connect other headphones or speakers to the dock/base station.
Good value: Yes
:
N/A
USB Input
What it is: A digital USB input instead of a typical 1/8 TRS line-in.
When it matters: A USB connection can provide both an audio input and power to the Dock or Base station.
:
N/A
RCA Input
What it is: Audio input using via an RCA connectors.
When it matters: Provides better stereo audio to the dock/base that's then transmitted to the headphones.
Good value: Yes
:
N/A
PS4 Compatible
What it is: Dock/Base station compatibility with the PlayStation 4.
When it matters: To be able to use all the features of the dock/base station with out losing audio or microphone capability.
Good value: Audio + Microphone
:
N/A
Xbox One Compatible
What it is: Dock/Base station compatibility with the Xbox One.
When it matters: To be able to use all the features of the dock/base station with out losing audio or microphone capability.
:
N/A
PC Compatible
What it is: Dock/Base station compatibility with your Personal Computer.
When it matters: To be able to use all the features of the dock/base station with out losing audio or microphone capability.
Good value: Audio + Microphone
:
N/A
Power Supply
What it is: The connector type of the power source for the base/dock.
When it matters: The accessibility of the power source. For example, a power supply with USB/USB-C connects to multiple devices, PC , PS4, Xbox One or even with your regular phone charger whereas an AC adapter is less common.
Good value: USB/USB-C
:
N/A
Dock Charging
What it is: Charging the headphones via the dock/base station instead of a charging cable.
When it matters: It makes charging your headphones easier and gives you a sport to store your headphones when they are not in use.
Good value: Yes
:
N/A

These headphones don't have a dock. For a gaming headset with a dock with tons of customization options, take a look at the SteelSeries Arctis Pro GameDAC. If you want a wireless gaming headset with a charging dock, we suggest the Astro A50.

0 Wireless Range
What it is: Headphones that offer a cable-free listening experience over a wireless network, typically via Bluetooth or radio frequency.
When it matters: When you don't want to be limited by the length of an audio cable. This means having the freedom to move around in your home or office with much greater range than an audio cable could provide, especially if the audio source is heavy or difficult to carry. Note that wireless range also depends on your audio source's signal strength, which may vary between devices.
Score components:
Obstructed Range
What it is: The range that the wireless headphones can reach before dropping any audio when the Bluetooth source was placed in another room. We test our obstructed range with a Moto E4 Plus. Results may vary depending on your phone model or Bluetooth source.
When it matters: If you can't or prefer not to carry your Bluetooth source on you while listening to your audio in an indoor environment. Although, the obstructed wireless range will slightly depend on your home or office layout. Note that wireless range also depends on your Bluetooth source's signal strength which may vary from device to device or depending on your phone model.
Good value: >35ft
Noticeable difference: 5ft
:
N/A
Line of Sight Range
What it is: The range that the wireless headphones can reach before dropping any audio when in direct line of sight of the Bluetooth device.
When it matters: If you can't or prefer not to carry your Bluetooth source on you while listening to your audio in a large and open environment.
Good value: 170ft or more
Noticeable difference: 10ft
:
N/A

These headphones are wired and don’t have a wireless range. You’ll be limited by their cable’s length.

10 Latency
What it is: How long it takes for audio to play through your headphones once the audio signal has been sent from a source.
When it matters: When gaming or watching movies. High latency means you will hear the audio much later than the images you see on screen. Note that latency also depends on the device and applications you use.
Score components:
Default Latency
What it is: The base RF latency or the default sub-band coding (SBC) of most Bluetooth headphones.
When it matters: When watching videos wirelessly, high latency can cause sync issues between the images you see and the audio you hear.
Good value: 50 ms or less
Noticeable difference: 15 ms
:
0 ms
aptX Latency
What it is: An audio coding algorithm (codec) that improves bit rate efficiency. It reduces latency and improves sound quality over Bluetooth.
When it matters: For better sound quality if you often stream music over Bluetooth. It also slightly improves latency when watching videos with wireless headphones.
Good value: 50 ms or less
Noticeable difference: 15 ms
:
N/A
aptX(LL) Latency
What it is: Low latency variation of aptX that significantly reduces sync issues between video and sound when using Bluetooth headphones.
When it matters: Latency is a lot more noticeable when watching videos or gaming than when just listening to music.
Good value: 50 ms or less
Noticeable difference: 5 ms
:
N/A

Thanks to their wired connection, the Logitech G635 won’t have any delay when watching video content or gaming, which is great.

In the box

  • Logitech G635 headphones
  • 1/8" TRRS audio cable
  • USB audio cable
  • Manuals

Compared to other Headphones

The Logitech G635 are good gaming headphones that set themselves apart by their great audio reproduction and their amazing companion software that offers tons of controls and customization options. However, their microphone is slightly bright when compared to other gaming headsets. See our recommendations for the best gaming headsets, the best gaming headsets for PC, and the best PS4 headsets.

Logitech G933 Wireless Gaming Headset

The Logitech G933 and Logitech G635 are practically identical in design, other than the fact the G933 is wireless and the G635 is wired. Overall, the microphone of the G933 has a better recording quality. The G635 also have better sound quality, but won’t offer the freedom of the G933’s wireless design, although you won’t have to worry about a battery life with the G635.

Logitech G935 Wireless Gaming Headset

The Logitech G935 and Logitech G635 are practically the same headphones, but the G935 are wireless while the G635 are wired. You get the same design and fit on both headsets, but the G935 have faux leather cup padding and the G635 have a mesh-like fabric. If you want the freedom of a wireless headset, go with the G935, but if you don’t want to manage battery life, the G635 will be a better option. There’s also a difference in the microphone recording quality and by listening to playback, we hear the G635 microphone as better even if it scores lower.

HyperX Cloud 2/Cloud II

If you don’t care much for customization options and RGB lighting, then the HyperX Cloud II are better gaming headphones than the Logitech G635, especially thanks to their great build quality and comfortable design. They also have a better microphone for online games and offer channel mixing on their in-line remote. However, the G635 has better sound quality, especially in the treble range, and is more customizable thanks to the G Hub app.

Logitech G533 Wireless Gaming Headset

The Logitech G533 are better gaming headphones than the Logitech G635 if you want a wireless-only headset. Both are built in fairly the same way and have very good audio reproduction. The microphone of the G533 is slightly better, but there’s not that big of a difference. The G533 can’t be used wired, and isn’t compatible with the Xbox One. The G635 can only be used wired but is compatible with all platforms thanks to its USB and analog cables.

Logitech G430 Gaming Headset

Both the Logitech G430 and the Logitech G635 are decent gaming headphones, but the G635 is better-built than the cheap, plasticky G430, and their sound quality is better. The new G Hub app is also better than the previous Logitech Gaming Software and offers more controls. You can also map different actions to the buttons on the G635, which you don’t have on the G430. However, the G430 might offer better value if you don’t mind not having RGB lighting, since they perform really well for budget headphones.

+ Show more

Conclusion

6.5 Mixed Usage
What it is: This is the combination of the different use cases to evaluate how versatile the headphones are. Therefore an everyday headphone should be well-rounded enough to adapt to most situations and environments without significant losses in sound quality, design ergonomics or isolation.
Score components:
Okay for mixed usage. The Logitech G635 are designed as gaming headphones, but they have a great audio reproduction that can be used for critical listening as well. The bulky design and poor isolation won’t be ideal to use for commuting or for sports, especially since they aren’t very stable. They don’t isolate much noise and can get a bit leaky as well, so using them at the office isn’t recommended either.
8.0 Critical Listening
What it is: The level of audio fidelity a headphone can reproduce. Therefore a balanced and true representation of bass, mids, treble, soundstage and imaging, as well as a comfortable listening experience, is essential for critical listening.
Score components:
Very good for critical listening. Their bass is extended and accurate, their mid-range is well-balanced and flat, and their treble is virtually flawless. However, their frequency response consistency is sub-par, which means they’ll perform differently on different users. These headphones are very versatile and will be suited for all music genres and will be great to reproduce video game effects as well. You can also EQ them inside their app, which is very useful and easy to do.
5.5 Commute/Travel
What it is: How well the headphones handle the loud environments involved in commuting or traveling. Therefore your listening experience should be comfortable, hassle-free and as isolated from noise as possible.
Poor for commuting. These headphones are one of the bulkiest designs we’ve reviewed so far. They also practically don’t isolate any low-end noises like the rumble of engines, which means they won’t be the best option to use in public transit.
5.8 Sports/Fitness
What it is: How well-adapted the headphones are, to use while doing sports or strenuous exercise. Therefore the headphones should not be too cumbersome and deliver a stable and comfortable listening experience.
Sub-par for sports. While the Logitech G635 can be tight on the head, they aren’t very stable and will most likely fall off your head during physical exercises. They also trap quite a bit of heat inside the ear cups, which means you’ll sweat noticeably more than usual when wearing these. The G635 are also very bulky and won’t be ideal for this use case.
6.1 Office
What it is: How well the headphones can deliver a comfortable and isolated listening experience in an office-like environment. They should not leak much and should block the noise of a busy office.
Mediocre for the office. They don’t isolate much noise and can get leaky at high volumes, which means you might disturb surrounding colleagues. On the upside, they are fairly comfortable to wear for a while and they have great sound quality. You also won’t have to worry about the battery dying on you in the middle of your workday since they are passive.
Mediocre for watching TV. The Logitech G635 aren’t wireless headphones, meaning you’d need an audio cable extension to be able to use them while sitting in your couch. On the upside, their sound quality is great and you won’t have any latency due to their wired connection. They can be a good option if you like watching streaming services on your computer or phone and don’t need wireless headphones.
7.3 Gaming
Decent for gaming. The G635 is one of the better sounding gaming headsets we’ve reviewed so far. The G Hub app is also amazing and offers tons of customization options with lots of controls. You won’t get any delay thanks to their wired connection, and they are comfortable to wear for long gaming sessions. However, be sure to take them off from time to time to let your ears cool off, as they trap quite a bit of heat inside the ear cups over time. Their microphone is also a bit bright when comparing it to other gaming headphones.

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