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  1. Table of Contents
  2. Intro
  3. Design
    1. Style
    2. Comfort
    3. Controls
    4. Breathability
    5. Portability
    6. Case
    7. Build Quality
    8. Stability
    9. Cable
    10. Top
    11. Headshots 1
    12. Headshots 2
  4. Sound
    1. Bass
    2. Mid
    3. Treble
    4. Raw Frequency Response
    5. Frequency Response Consistency
    6. Imaging
    7. Soundstage
    8. Total Harmonic Distortion
  5. Isolation
    1. Noise Isolation
    2. Leakage
  6. Microphone
    1. Recording Quality
    2. Noise Handling
  7. Active Features
    1. Battery
    2. App Support
  8. Connectivity
    1. Bluetooth
    2. Wired
    3. Base/Dock
    4. Wireless Range
    5. Latency
  9. In the box
  10. Conclusion
  11. Q&A
Reviewed on Dec 05, 2016 , Sam Vafaei, Jean-Christophe Lamontagne

Sennheiser PXC 550 Wireless Headset
HEADPHONES REVIEW

Usage Ratings - Version 1.2
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Test Benches:

  • 1.2: Winter 2018
  • 1.1: Summer 2017
  • 1.0: Winter 2017
  • 0.9: Winter 2016
7.2
Mixed Usage
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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:
7.5
Critical Listening
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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:
7.4
Commute/Travel
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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.
Score components:
7.3
Sports/Fitness
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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.
Score components:
7.4
Office
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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.
Score components:
5.9
Home Theater
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Score components:
5.7
Gaming
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Score components:
Type : Over-ear
Enclosure : Closed-Back
Wireless : Yes
Noise-Cancelling : Yes
Mic : Yes
Transducer : Dynamic

The Sennheiser PXC 550 Wireless are a superbly well-designed set of headphones. They have great active features, a customizable sound, and decent isolation performance. They're lightweight comfortable and stable enough to jog with. However, they don't have the most immersive sound quality, and their isolation is not as good as the QuietComfort 35 in louder environments.

See our recommendations for the best Bluetooth Headphones.
Test Results
Design 7.3
Sound 7.5
Isolation 7.0
Microphone 6.9
Active Features 8.6
Connectivity 6.5
Pros
  • Highly customizable sound.
  • Lightweight and sturdy build quality.
  • Comfortable and stable fit.
Cons
  • Mediocre noise cancelation.
  • Leaky at higher volumes.
Update 2/16/2018: Converted to Test Bench 1.2.
Update 9/28/2017: The microphone has been tested with our new methodology, as explained here
Update 8/10/2017: Converted to Test Bench 1.1. Learn more about our new versioned test bench system here.

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PXC 550 Wireless
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7.3

Design

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Score components:
Sennheiser PXC 550 Wireless Design Picture

The PXC 550 are sleek-looking wireless headphones with a premium appeal and a comfy fit. The ear cups and headband are both very well-padded, which make these headphones comfortable to wear for hours. They're lightweight yet the build quality feels durable enough to withstand a couple of drops without damage. Their design is also sufficiently stable to jog with, although they won't be the best for intense sports. They're not the most portable headphones, which can be a bit of a hassle to carry on your person but they fold up and come with a decent case.

Style
Sennheiser PXC 550 Wireless Design Picture 2

The PXC 550 have modern and sleek design that not too flashy but will still stand out in a crowd. The slightly oval ear cups and wide headband are well padded with premium materials giving these headphones a high-end appeal. They're mid-sized over-ear headphones, but the headband has a relatively low-profile fit, so it won't stick out too much when you have them on your head. They have a very understated color scheme which might not be for everyone but will definitely work for some.

7.5 Comfort
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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
Sennheiser PXC 550 Wireless Comfort Picture
Weight : 0.51 lbs
Clamping Force
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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.
:
0.97 lbs

The PXC 550 are one the most comfortable closed back headphones we've tested. They're incredibly well padded and the earcups are large enough to fit comfortably around most ears. The headband is also heavily cushioned and they're relatively lightweight. They're a bit tighter on the head than the QC 35 but they won't cause any fatigue or soreness even during long listening sessions.

7.3 Controls
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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.
Sennheiser PXC 550 Wireless Controls Picture
Ease of use : Average
Feedback : Mediocre
Call/Music Control : Yes
Volume Control : Yes
Microphone Control : No
Channel Mixing
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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.
:
N/A
Noise Canceling Control : Adjustable
Talk-Through : Adjustable
Additional Buttons : Room Effects

The PXC 550's button layout provides a surprising amount of control over your audio but it's not always efficient or intuitive. Like the Zik 3.0, these headphones have a touch sensitive control scheme that provides track skipping, call/music, and volume controls. There's a multi-purpose button that doubles as a Bluetooth sync and audio preset toggle. They also have a noise canceling switch that can place the headphones in "Aware" mode to be able to monitor your environment. This all feels a little confusing at times.

6.8 Breathability
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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:
Sennheiser PXC 550 Wireless Breathability After Picture
Avg.Temp.Difference : 4.5 C
6.3 Portability
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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:
Sennheiser PXC 550 Wireless Portability Picture
L : 5.50 "
W : 7.13 "
H : 1.88 "
Volume : 73.7 Cu. Inches
Stand required : N/A

The PXC 550 are moderately portable headphones. They're a mid-sized over-ear model with relatively large ear cups that fold but do not tuck-in neatly into the frame. This makes them decently portable but not the easiest to carry around on your person without a bag. The ear cups also lay flat, but that doesn't save much space so they're best transported in their carrying case to avoid damage.

7.0 Case
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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
Sennheiser PXC 550 Wireless Case Picture
Type : Soft case
L : 7.00 "
W : 7.63 "
H : 2.5 "
Volume : 133.53 Cu. Inches

Comes with a decent soft case that will protect the headphones from mild water damage and potential scuffs and scratches. Unfortunately, the case will not shield them from hard falls or physical damage.

7.5 Build Quality
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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
Sennheiser PXC 550 Wireless Build Quality Picture

Although the PXC 550 are lightweight they feel solid. They have a good build quality that makes us of premium materials in its design. The headband is reinforced by a thin but wide metal frame and the earcups are made out of a dense plastic that's durable enough to withsand a few drops and tumbles without damage. The swiveling mechanism is firm but has a snap to turn on feature which may potentially fail after prolonged use. However we've had no issues with our unit so far.

7.5 Stability
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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
Sennheiser PXC 550 Wireless Stability Picture

These headphones have a stable wireless design that won't easily fall off your head. The firm swivel hinges, combined with the wide headband, and broad ear cups prevent the headphones from swaying too much even during physical activity. They won't be the best choice for exercising or intense sports but the stability they provide is decent enough to jog with. The wireless design also removes the chances that the headphones will be yanked off your head because the audio cable got hooked on something.

Cable
Sennheiser PXC 550 Wireless Cable Picture
Detachable : Yes
Length : 4.4 ft
Connection : 1/8" TRS

Comes with a 1/8"TRS to 1/16"TRS audio cable, and a USB charging cable.

Top
Headshots 1
Headshots 2
7.5

Sound

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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.)
Sennheiser PXC 550 Wireless Frequency Response

The Sennheiser PXC 550 Wireless are a decent sounding pair of closed-back over-ear headphones. They have a very good bass, an excellent mid-range, and a good treble. However, their bass could have a bit more thump, and their delivery may vary slightly from person to person. Also, their treble tends to sound sharp and sibilant on overly bright tracks, and like most other closed-back headphones, they lack an open and spacious soundstage.

9.0 Bass
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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:
Sennheiser PXC 550 Wireless Bass
Std. Err.
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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
:
1.32 dB
Low-Frequency Extension
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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
:
25.94 Hz
Low-Bass
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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
:
-1.8 dB
Mid-Bass
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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
:
-1.42 dB
High-Bass
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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
:
0.91 dB
8.8 Mid
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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:
Sennheiser PXC 550 Wireless Mid
Std. Err.
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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
:
1.6 dB
Low-Mid
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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
:
-0.19 dB
Mid-Mid
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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
:
-0.74 dB
High-Mid
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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
:
1.13 dB
7.8 Treble
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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:
Sennheiser PXC 550 Wireless Treble
Std. Err.
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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
:
3.65 dB
Low-Treble
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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
:
0.21 dB
Mid-Treble
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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
:
1.49 dB
High-Treble
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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
:
1.39 dB
6.9 Frequency Response Consistency
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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:
Sennheiser PXC 550 Wireless Consistency L Sennheiser PXC 550 Wireless Consistency R
Avg. Std. Deviation
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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
:
0.64 dB
8.1 Imaging
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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.
Sennheiser PXC 550 Wireless Group Delay Sennheiser PXC 550 Wireless Phase Response
Weighted Group Delay
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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
:
0.34
Weighted Amplitude Mismatch
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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
:
0.54
Weighted Frequency Mismatch
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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
:
1.89
Weighted Phase Mismatch
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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
:
12.16
4.3 Soundstage
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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.
Sennheiser PXC 550 Wireless PRTF
PRTF Accuracy (Std. Dev.)
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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°. PRTF is derived by subtracting the frequency response of a headphone measured with a pinna, from its frequency response measured with the pinna removed (similar to a flatbed). The range of this calculation is 1.5KHz-8KHz. 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
:
5.31 dB
PRTF Size (Avg.)
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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°. PRTF is derived by subtracting the frequency response of a headphone measured with a pinna, from its frequency response measured with the pinna removed (similar to a flatbed). The range of this calculation is 1.5KHz-8KHz. 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
:
4.43 dB
PRTF Distance
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What it is: The amplitude difference between the average PRTF level of the 3KHz-7KHz range, and the lowest PRTF amplitude in the 8KHz-12KHz range. This is attempts to measure the "10KHz notch" of the headphones which is caused by phase cancellations at the concha. PRTF (Pinna-related transfer function) of a headphone compared to a reference loudspeaker's PRTF at 30°. PRTF is derived by subtracting the frequency response of the headphones measured with a pinna, from its frequency response measured with the pinna removed (similar to a flatbed). 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
:
4.09 dB
Openness
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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 or the CSD 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
:
3.0
Acoustic Space Excitation
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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
:
3.2
Correlated Crosstalk
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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
:
0.02 dB
6.8 Total Harmonic Distortion
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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:
Sennheiser PXC 550 Wireless Distortion
Weighted THD @ 90
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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
:
3.339
Weighted THD @ 100
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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
:
9.159
7.0

Isolation

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Score components:

The PXC 550 have a decent isolation but are they're not as good as the similarly designed QuietComfort 35. They still provide enough isolation to use them while on public transit without being too distracted by the loud environment. However, they won't be the best headphones to block out the noise of a particular noisy flight. On the upside, they don't leak much at moderate volumes, but in quiet settings the level of leakage could be distracting to those around you.

6.9 Noise Isolation
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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 envinronment (airplane, subway, etc.)
Score components:
Sennheiser PXC 550 Wireless Noise Isolation
Overall Attenuation
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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
:
-14.54 dB
Bass
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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
:
-4.04 dB
Mid
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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
:
-16.54 dB
Treble
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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
:
-30.21 dB
Self-Noise
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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
:
12.53 dB

Average Isolation. The ANC on these headphones seem to be adding low-frequency artifacts that could go as high as 60Hz. This could potentially be heard in certain situations. The active cancellation provided from 100Hz to 1KHz is within good values. Like other ANC headphones, these headphones isolate passively above 1KHz. However, their performance in the Treble Range is only average probably due to seal issues.

7.2 Leakage
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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:
Sennheiser PXC 550 Wireless Leakage
Overall Leakage @ 1ft
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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
:
38.4 dB

Average Leakage performance. There is little leakage happening below 1KHz, and the amount of leakage from 1KHz onward is not too loud. However, the high-treble leakage seems uncharacteristic of closed-back headphones and could be due to poor seal.

6.9

Microphone

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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
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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
:
Yes
In-line
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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
:
Yes
Boom
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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
:
No
Detachable Boom
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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.
:
N/A
6.6 Recording Quality
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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:
Sennheiser PXC 550 Wireless Microphone Frequency Response
Recorded Speech
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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
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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
:
293.44 Hz
FR Std. Dev.
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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
:
2.68 dB
HFE
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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
:
3517.32 Hz
Weighted THD
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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
:
2.138
Gain
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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
:
36.92 dB
7.2 Noise Handling
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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:
Sennheiser PXC 550 Wireless SpNR
Speech + Pink Noise :
Speech + Subway Noise :
SpNR
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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
:
21.98 dB
8.6

Active Features

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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 PXC 550 have one of the most feature-packed apps that we have evaluated so far. They also have a great battery life, especially, considering these are wireless and active noise canceling headphones. They will last up to 27 hours they have great and versatile power saving features and do not take too long to charge. Unfortunately, although they have a stable wireless connection that has quite a decent range and supports aptX and NFC pairing, they have quite a bit of latency which is most noticeable when watching videos.

8.7 Battery
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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
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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.
:
Rechargable
Battery Life
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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
:
27.5 hrs
Charge Time
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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
:
2.1 hrs
Power Saving Feature
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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.
:
Yes
Audio while charging
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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 your relatively close to a power source. However, this means wireless headphones will need a wired connection to the power source during the charging process.
:
Yes
Passive Playback
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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.
:
Yes

The PXC 550 have an excellent battery performance. They last well over a day of continuous, wireless playback and only take about 2 hours to charge. They have an adjustable auto-off timer to save power and can continue charging while playing audio, which is great if you're close to a power outlet, like being at the office. They can also play passively when the battery is dead.

8.0 App Support
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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
Sennheiser PXC 550 Wireless App Picture
App Name : Sennheiser Cap Tune
iOS : Yes
Android : Yes
Mac OS : N/A
Windows : N/A
Equalizer
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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.
:
Parametric + Presets
ANC control
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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.
:
Adjustable
Mic Control : N/A
Room effects
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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.
:
Yes
Playback control
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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.
:
Yes
Button Mapping : N/A
Surround Sound : N/A

The Sennheiser Cap Tune app give you an amazing amount of control over the active features of the PXC 550. They provide lots of options, from an auto-off timer to an adjustable Noise Canceling profile. The best feature, however, is the fully parametric equalizer, which lets you customize the sound to suit your taste for particular music genres, or even an individual track. The app is available for both Android and iOS with no practical difference between versions and it is one of the most complete companion apps we've tested. However, the sheer number of features and menus can get overwhelming at times, and there's a slight learning curve before you can use the app to its full potential.

Sennheiser PXC 550 Wireless In-App Player

Sennheiser PXC 550 Wireless Parametric Equalizer

Sennheiser PXC 550 Wireless Room Effects

6.5

Connectivity

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What it is: The inputs and outputs of wired and wireless headphones, as well as their latency performance and range.
When it matters: To know how compatible your Bluetooth device, console or PC will be with your wired or wireless headset.
Score components:
  • 10% Bluetooth
  • 32% Wired
  • 10% Base/Dock
  • 22% Wireless Range
  • 25% Latency
8.8 Bluetooth
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What it is: Bluetooth support for wireless headphones.
When it matters: To connect wirelessly to Bluetooth sources like your phone, tablet, console, PC and TV.
Score components:
  • 79% Multi-Device Pairing
  • 20% NFC
  • 0% PS4 Compatible
  • 0% Xbox One Compatible
Bluetooth Version : 4.2
Multi-Device Pairing
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What it is: A Bluetooth profile that's allows some headphones to be simultaneously connected to multiple Bluetooth sources.
When it matters: To quickly switch between your Bluetooth sources. For example switching from your phone to your home or work PC.
Good value: 2 devices.
:
2 Devices
NFC
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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
:
Yes
PS4 Compatible
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What it is: Bluetooth compatibility with the PlayStation 4.
When it matters: To connect your headphones wirelessly with your PS4.
Good value: Audio + Microphone
:
No
Xbox One Compatible
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What it is: Bluetooth compatibility with the Xbox One.
When it matters: To connect your headphones wirelessly with your Xbox one.
Good value: Audio + Microphone
:
No
9.1 Wired
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What it is: The type and compatibility of audio cables for wired and wireless headphones.
When it matters: For all devices with a regular audio jack (line-out) and also compatibility of the in-line remote/boom microphone with consoles and Personal computers.
Score components:
  • 13% Analog
  • 9% USB
  • 26% PS4 Compatible
  • 26% Xbox One Compatible
  • 26% PC Compatible
Analog
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What it is: A regular 1/8" TRS audio jack or a 1/4 or 1/16 TRS with a 1/8 TRS adapter.
When it matters: For all devices with a line out.
Good value: Yes
:
Yes
USB
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What it is: A USB or USB adapter to connect to your devices for audio and microphone.
When it matters: A digital USB adapter usually offers a slight advantages over a regular audio jack, like a DAC, and amplifier module or software support and compatibility with PCs. However it may not be as compatible with consoles.
Good value: Yes
:
No
PS4 Compatible
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What it is: PS4 compatibility with a regular 3 or 4 pin 1/8 TRS audio cable.
When it matters: When you want to use a wired headphone with your PS4
Good value: Audio + Microphone
:
Audio + Microphone
Xbox One Compatible
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What it is: Xbox One compatibility with a regular 3 or 4 pin 1/8 TRS audio cable.
When it matters: When you want to use a wired headphone with your Xbox One
Good value: Audio + Microphone
:
Audio + Microphone
PC Compatible
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What it is: PC compatibility with a regular 3 or 4 pin 1/8 TRS audio cable.
When it matters: When you want to use a wired headphone with your PC.
Good value: Audio + Microphone
:
Audio + Microphone
0 Base/Dock
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What it is: The base station, dock or dongle transmitter of wireless headphones that receive data/audio via a proprietary frequency range.
When it matters: Knowing the inputs and outputs of the base/dock/dongle as well as its compatibility with consoles and Personal Computers. Also whether the base supports dock charging to easily recharge the headphones without any cables.
Score components:
  • 4% Optical Input
  • 22% Line In
  • 4% Line Out
  • 22% USB Input
  • 4% RCA Input
  • 9% PS4 Compatible
  • 9% Xbox One Compatible
  • 9% PC Compatible
  • 2% Power Supply
  • 13% Dock Charging
Wireless Type
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What it is: The type of wireless connection used by the base station/dock to communicate with the headphones.
When it matters: For latency and range. For example Radio frequency has low latency but mediocre range when obstructed and proprietary docks have their own 2.x GHz or 5 GHz frequency which varies in performance.
:
N/A
Optical Input
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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
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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
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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
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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
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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
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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
Show Help
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
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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
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What it is: The connector type of the power source.
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 a A/C adapter is less common.
Good value: USB/USB-C
:
N/A
Dock Charging
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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
8.9 Wireless Range
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What it is: Headphones that offer a cable-free listening experience over a wireless network, typically via Bluetooth or radio frequency.
When it matters: If 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 a much greater range than an audio cable could provide, especially, if the Bluetooth source is heavy or difficult to carry.
Score components:
Obstructed Range
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What it is: The range that the wireless headphones can reach before dropping any audio when the Bluetooth source was placed in another room.
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.
Good value: >35ft
Noticeable difference: 5ft
:
51 ft
Line of Sight Range
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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
:
145 ft

The PXC 550 have a great wireless range indoors or outdoors. They were able to reach up to 50ft when the audio source was placed in another room. This makes them good headphones to use around your home or at the office as they won't easily drop the Bluetooth connection even when there are a few walls between you and the source. They have NFC and remember the last synced device. However, switching between devices that are not NFC-enabled can be quite tedious as their pairing state can sometimes have difficulties connecting to new devices.

2.6 Latency
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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.
Score components:
Default Latency
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What it is: The Base RF latency or the default sub-band coding (SBC) of most Bluetooth headphones.
When it matters: When watching videos a high latency can cause sync issues between the images you see and the audio you hear.
Good value: 50ms or less
Noticeable difference: 15ms
:
200 ms
aptX Latency
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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 your often streaming music over Bluetooth. Also it slightly improves latency when watching videos with wireless headphones.
Good value: 50ms or less
Noticeable difference: 15ms
:
171 ms
aptX(LL) Latency
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What it is: Low latency variation of aptX that significantly reduces sync issues between video and sound when using Bluetooth headphones.
When it matters: When watching videos or gaming latency is a lot more noticeable than just listening to music.
Good value: 50ms or less
Noticeable difference: 5ms
:
N/A

Poor latency performance. They have as much latency as most Bluetooth headphones without a low latency codec which means they won't be ideal for watching movies or gaming.

In the box

Sennheiser PXC 550 Wireless In the box Picture

  • Sennheiser PXC 550 headphones
  • Audio cable
  • Airline adapter
  • 1/8' to 1/4' adapter
  • Carrying case
  • USB charging cable
  • Manual

Conclusion
SEE PRICE
Amazon.com

7.2Mixed Usage
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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:
The PXC 550 Wireless are good, versatile headphones that perform admirably in most use cases. They have a highly customizable sound to suit your individual tastes, and they isolate well enough for moderately loud environments. Their wireless design feels comfortable stable and durable. Unfortunately, they don't excel in one particular use case, and the isolation can be a little weak compared to the competition.
7.5Critical Listening
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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:
Above-average for critical listening. These headphones have a multitude of ways to enhance and customize their audio reproduction. Therefore you could find a sound profile to suit your taste, but it might not be the most accurate representation of the actual audio. The default sound profile is decently balanced and should sound good enough for most listeners. However, the lack of Soundstage may not be ideal for those who want a more immersive sound.
7.4Commute/Travel
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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.
Score components:
Good for commuting. They have a decent noise isolation performance, they're comfortable and give you a high amount of control over your audio directly on the headphones or through the app. However, they're not the best in very loud environments.
7.3Sports/Fitness
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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.
Score components:
Above-average for sports. They're not specifically designed for high-intensity activities, but they're stable enough to jog with. They have a comfortable fit and provide great control over your audio.
7.4Office
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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.
Score components:
Suitable for office use. They don't leak much at regular volumes and isolate enough to prevent the ambient noise of a lively office from seeping into your audio.
5.9Home Theater
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Score components:
Average for home theater use. They have a comfortable design and a good wireless range. However, their latency is a bit high even with aptX enabled.
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Questions & Answers

5 ANSWERED QUESTIONS
2
Hello, I am trying to seek your expert advise for a set of headphones. My goal is to find a set that is wireless so I can use them while I do yard work and block out sound while listening to music, talk radio etc from my iphone. I also work from home in my office and would like the same pair to be able to connect to my cordless Panasonic phone via included cable with the headphones to the 2.5mm headphone jack. Reason being is that I am on a lot of conference calls and that had to be a big factor in my search. So needing active noise cancellation, wireless and a cable to be able to connect to my phone for work. So far I narrowed it down to the Sennheiser PXC 550, Sony MDR-1000X and the Bose QC 35. I would love your advise on which one and even if its a different model I have not thought of. One thing to note is that I do understand that it will be a jack of all trades headset and i dont have to have the best noice cancellation or audio. The most important is the call functions with the cord. Thank you in advance!

QC35 and MDR1000X have superior noise cancelling compared to the PXC550. With MDR1000X you have the option of turning the ANC off, but with QC35 the ANC is always on. On the other hand, the QC35 has the best sound quality out of the three, but it requires a 1/16th TRS jack instead of a 1/8th (2.5mm).

If you don't care about being able to turn off the ANC, and can find a 1/16th jack adapter, then we'd recommend the QC35. Otherwise, the MDR1000X would be a better fit for you than the PXC550 because of their better ANC.

2
Hello! I am currently heavily debating between the PXC550s and the QC35s, but I'm still torn even after reading both of their reviews. One question I have not been able to find an answer to is what is the quality of the microphones? I briefly tested the QC35 in Best Buy as of September 2017, and I noticed a lot of background noise/hissing. I have not been able to find a pair of PXC550s on display to test them out. I'm curious about this because I will be using these in an office like environment for phone calls. Were any official tests conducted on these mics? If not, could you perhaps comment on their call quality? Also, was the audio pass through better on the PXC550s than the Sony MDR1000X? Thank you in advance!
We have just published our microphone test results, and you can check the results for yourself here. Based on our tests results the PXC 550 is slightly, but noticeably, better than the QC35. The audio pass through is not very different between the 550 and 1000X. We have also made recordings of the microphones' performance, which are planning to make available on the website as part of a playback feature.
1
Could I use the Sennheiser PXC 550 or momentum for bluetooth TV use? Thank you !
Yes, you can use the PXC 550 Wireless or the Momentum 2.0 Wireless with a Bluetooth-enabled TV. The Momentum especially have a bit less Base latency than the PXC 550 but they're not as comfortable or as feature-packed. Unfortunately, both have relatively high latency so they won't be the ideal headphones for watching videos. Check out our Wireless article and Home Theater recommendations for more options.
1
In review after review, I find that reviewers neglect to mention that you can connect (not just pair) two devices on both the Sennheiser PXC 550 and Bose QC 35. The utility of this function is way underestimated. I work from home and with one pair of headphones (Sennheiser) I can listen to music from my iMac and receive calls from my iPhone. Just sayin'.
We agree that there should be an additional test in Active Features for Multi-pairing/ Dual connect capabilities for wireless headphones. We will add it to a future test bench update once we have a way to reliably test and evaluate that feature.
1
According to the Sennheiser PXC 550 manual, the headset does operate in passive mode once the battery has been depleted. This is contrary to the information provided in the battery section of the PXC 550 review.
Thank you for noticing the error in the review. We tested the Sennheiser PXC 550 Wireless again and can confirm that they do work passively. The review has been updated.
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