Reviewed on Dec 05, 2016 , Marc Henney, Jean-Christophe Lamontagne

Sennheiser PXC 550 Wireless
HEADPHONES REVIEW

Usage Ratings
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.
7.2Critical 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:
7.2Commute/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.
7.4Sports/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.
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.
6.7Studio Recording
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What it is How effective the headphones are in a studio recording environment. Therefore sound quality should be good, and leakage should be minimal, to not add noise to the recording. They should also be durable for continuous and repeated studio use.
    Table of Contents
  1. Intro
  2. Design
    1. Style
    2. Comfort
    3. Controls
    4. Stability
    5. Portability
    6. Case
    7. Build Quality
    8. Cable
    9. Front
    10. Angled
    11. Side
    12. Rear
    13. Top
  3. Sound
    1. Bass
    2. Mid
    3. Treble
    4. Soundstage
    5. Imaging
    6. Total Harmonic Distortion
  4. Isolation
    1. Noise Isolation
    2. Leakage
  5. Active Features
    1. Wireless
    2. Battery
    3. App Support
  6. In the box
  7. Conclusion
  8. Q&A
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.

Test Results
Design 7.4
Sound 7.1
Isolation 6.2
Active Features 8.4
Pros
  • Highly customizable sound.
  • Lightweight and sturdy build quality.
  • Comfortable and stable fit.
Cons
  • Mediocre noise cancelation.
  • Leaky at higher volumes.

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7.4

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.

8.0 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.

7.5 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.
Score components: Subjectively assigned
Sennheiser PXC 550 Wireless Controls Picture
Call/Music Control : Yes
Volume Control : Yes
Additional Buttons : Multi function

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.

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.

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

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.

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.

Front
Angled
Side
Rear
Top
7.1

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.)
Score components:
Sennheiser PXC 550 Wireless Frequency Response

The PXC 550 have a versatile sound profile that can be customized, in-app, with a fully parametric equalizer or with the limited, built-in presets, available via the multi-function Bluetooth sync button. The default profile, however, does a sufficiently good job delivering a powerful bass that doesn't overshadow the instruments and vocals in the mid-range. The higher tones are a little inconsistent and a bit sharp. Unfortunately, the poor sound Soundstage, by design, makes these headphones less ideal for critical listeners.

9.1 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
:
2.26 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
:
21.65 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
:
-0.75 dB
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
:
-0.96 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
:
0.11 dB

Very good Bass Range performance. There is a bit of inconsistency in low-bass, but won't be audible to most people. Bass and high-bass and are virtually flat and unremarkable.

9.2 Mid
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What it is: Frequency Response from 250Hz-2.5KHz
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
:
1.08 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 boxy. Under-emphasis, thins out the vocals and lead instruments.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-1.06 dB
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 honky. Under-emphasis pushes instruments to the back of the mix.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
-0.61 dB
High-Mid
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What it is: The average amount of over/under-emphasis in frequency response from 1KHz-2.5KHz.
When it matters: Most instruments, especially vocals, get their intensity and clarity from this range. Over-emphasis sounds harsh, under-emphasis sounds weak and distant.
Good value: +/-3dB
Noticeable difference: 0.1dB
:
0.43 dB

Excellent Mid Range performance. The entire Mid Range response is very consistent and flat, and the small deviations from the target response are negligible.

6.1 Treble
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What it is: Frequency Response from 2.5KHz-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
:
5.81 dB
Low-Treble
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What it is: The average amount of over/under-emphasis in frequency response from 2.5KHz-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
:
-1.93 dB
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
:
2.29 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
:
3.11 dB

Average Treble Range performance. Low-treble shows a 10dB dip at 4.5KHz, but because of the relatively narrow width its negative effects on detail and presence will be small. The bump in treble between 7KHz and 10KHz shows these headphones could sound a bit sibilant to those with sensitive ears.

4.0 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.
PRTF Error
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What it is: The average amount of deviation in Pinna-Related Transfer Function of the headphones, compared to that of a loudspeaker. Whether the soundstage is perceived to be unnatural, located inside or in front of the head, is dependent on this quality. The more the headphones activate the HRTF resonances of the ear (similar to what loudspeakers do), the more the soundstage will be pulled out from inside the listener's head. This quality affects both stereo and mono content.
When it matters: When a natural, in-the-front soundstage is desired, similar to that of a loudspeaker.
Good value: <5
Noticeable difference: 0.5
:
8.44 dB
Openness
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What it is: How open the headphones are, and how open and spacious they sound. This quality affects both stereo and mono content. 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.
When it matters: When an open, wide and roomy sound 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
:
4.0
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 takes some of the characteristic of its environment (reflections/reverb) before reflecting back into the open headphones and to the listener's ears. This quality affects both stereo and mono content. This value is the inverse of the Leakage test score.
When it matters: When an open, wide and roomy sound is desired.
Good value: >7.5
Noticeable difference: 0.5
:
3.4
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

Poor Soundstage. Because of the close-back and noise-cancelling design, the Openness score is quite low, as these headphones sound closed and don't interact with their environment acoustically. Additionally, the PRTF error is rather high for an over-ear design, showing these headphones don't activate the resonance of the pinna the way a loudspeaker does.

6.5 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 Phase Response
Phase Error
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What it is: The average amount of deviation in the phase, from the ideal flat response.
When it matters: When an accurate and transparent imaging is desired.
Good value: <60°
Noticeable difference: 10°
:
820.58 °
Driver Mismatch (Amplitude)
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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: <0.3dB
Noticeable difference: 0.1dB
:
0.39 dB
Driver Mismatch (Frequency)
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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: <2dB
Noticeable difference: 0.1dB
:
0.43 dB
Driver Mismatch (Phase)
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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: <90°
Noticeable difference: 30°
:
388.69 °

Average Imaging. The amount of phase error is one of the highest we have measured, which is most likely due to the Bluetooth design. However, phase shift only becomes easily noticeable at higher frequencies and is negligible at other times.

9.5 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
:
0.07
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
:
0.118

Good distortion restuls. At 90dB SPL these headphones perform well throughout the spectrum, although the amount of harmonic distortion in the Treble Range approaches 1% of the input. At 100dB SPL, there is rise in the amount of distortion of Bass and Mid Ranges, but little change in the Treble Range.

6.2

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.

6.0 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 200Hz-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: <18dB
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.

6.6 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
:
39.56 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.

8.4

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.

8.1 Wireless
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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.
Type
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What it is: The type and version of the wireless network, the headphones use to connect to the audio source. This could either be Bluetooth or radio frequency.
When it matters: The Bluetooth version will determine how compatible the headphones are with your Bluetooth enabled devices. Typically, newer Bluetooth versions are backward compatible with older ones but may lack the additional features that more recent Bluetooth protocols provide.
:
Bluetooth Smart 4.2
SBC Latency
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What it is: The latency for the default sub-band coding 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: 170ms 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: 130ms 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
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
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.
:
Yes

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.

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.
Score components:
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
Auto-off
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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

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. This makes them good headphones to use in most travel situation unless you have no access to a power source for more than 24 hours.

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
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
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

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

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 Amazon.co.uk CHECK PRICE Right

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.
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.
7.2Critical 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.
7.2Commute/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.
Above-average 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.
7.4Sports/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.
Good 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.
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.
6.7Studio Recording
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What it is How effective the headphones are in a studio recording environment. Therefore sound quality should be good, and leakage should be minimal, to not add noise to the recording. They should also be durable for continuous and repeated studio use.
Decent for recording. They have a moderately durable design and a customizable sound. However, they're slightly leaky at higher volumes and are bit overly complicated to use in a simple recording environment.
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