Table of Contents
  1. Intro
  2. Design
    1. Style
    2. Comfort
    3. Controls
    4. Stability
    5. Portability
    6. Case
    7. Build Quality
    8. Breathability
    9. Cable
    10. Front
    11. Angled
    12. Side
    13. Rear
    14. Top
  3. Sound
    1. Bass
    2. Mid
    3. Treble
    4. Frequency Response Consistency
    5. Soundstage
    6. Imaging
    7. 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
Reviewed on Oct 31, 2016 , Marc Henney, Jean-Christophe Lamontagne

JBL E50BT
HEADPHONES REVIEW

Usage Ratings
6.7Mixed 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:
7.2Critical 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:
6.3Commute/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:
6.8Sports/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:
6.6Office
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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:
Type : Over-ear
Enclosure : Closed-Back
Wireless : Yes
Noise-Cancelling : No
Mic : Yes
Transducer : Dynamic

The JBL E50BT are stylish, wireless headphones with a decent sound and a sturdy, durable build. They have a well-crafted design but oddly shaped ear cups that don't fit properly around the ears. Unfortunately, this creates a poor seal that lets noise seep into your audio and also leaks quite a bit.

Test Results
Design 6.3
Sound 7.3
Isolation 5.2
Active Features 7.0
Pros
  • Above-average audio reproduction.
  • Sturdy and durable build.
  • Great wireless range.
Cons
  • Poor noise isolation.
  • Leaky at moderate-to-high volumes.
  • Awkward ear cup fit can be uncomfortable.

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6.3

Design

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Score components:
JBL E50BT Design Picture

The JBL E50BT are rugged yet stylish and feel somewhat high-end. They're not as well made as some premium headphones we've tested, but they have a sturdy frame and dense ear cups that can handle a few drops without getting damaged. Unfortunately, the oddly sized ear cups are also uncomfortable. They're bulky, cumbersome headphones to comfortably carry on your person and they're not stable enough to use while jogging.

Style
JBL E50BT Design Picture 2

The JBL E50BT have a good design that gives them a more premium appeal than their price point would suggest. They have circular and flat ear cups that do not protrude outwards once on your head. The headband and frame are wide and look sturdy. They come in a variety of color schemes to suit your tastes. They won't be the ideal looking headphones for everyone, and the hinge mechanism looks a little awkward.

6.0 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
JBL E50BT Comfort Picture
Weight : 0.64 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.
:
0.92 lbs

The JBl E50BT have oddly sized ear cups that don't quite encompass the ears. Therefore the fit is somewhere between an over ear and an on-ear design, which unfortunately means they won't be the most comfortable for listeners with larger ears. They're not too tight but the rigid padding and the awkward fit exerts pressure on the tip of your ears, which gets uncomfortable 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
JBL E50BT Controls Picture
Call/Music Control : Yes
Volume Control : Yes

These headphones offer good button placement and functionality. They provide call/music, track skipping, and volume controls, which can all be found on the left ear cup including the power/Bluetooth sync button. The controls do not feel cramped and are well laid out. However, the buttons are flat with no tactile indicators.

6.5 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
JBL E50BT Stability Picture

The E50BT are moderately stable. They're sufficiently tight on the head and won't move much during casual listening sessions. However, they're not sports headphones. They're bulky and will quickly fall when used while running or jogging. On the upside, the wireless design makes them less likely to be yanked off your head due to the audio cable being hooked on something.

6.5 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:
JBL E50BT Portability Picture
L : 5 "
W : 3.4 "
H : 3.6 "
Volume : 62.4 Cu. Inches

These headphones are not the most portable. They fold into a compact format and the ear cups also lay flat. Although due to the wide headband this doesn't save much space. They're a little on the larger side for over-ear headphones and will be cumbersome to carry on your person without a bag.

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
Type : No case

7.0 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
JBL E50BT Build Quality Picture

The JBL E50BT have a pretty sturdy build quality. The ear cups look robust and dense enough to handle a few drops without getting damaged. The headband and frame are also relatively thick and flexible and should be able to withstand moderate-to-high physical stress. However, the hinge mechanism only connects on one side of the earcups, which gives them a greater range of motion but also slightly weakens the build.

7.1 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:
  • 100% Avg.Temp.Difference
JBL E50BT Breathability Before Picture JBL E50BT Breathability After Picture
Avg.Temp.Difference : 3.9 C

Cable
Detachable : Yes
Length : 4.11 ft
Connection : 1/8" TRRS

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

Front
Angled
Side
Rear
Top
7.3

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:
JBL E50BT Frequency Response

The JBL  E50BT have an above-average sound quality that provides a punchy bass but slightly underwhelming instruments and vocals. The high tones are not too sharp, and they have a good amount of low end, which should please fans of bass. They also have a decent Soundstage.  However, there's a dip in the mid-range that removes some of the warmth in the audio reproduction. It's not a deal-breaker for most, but they might not sound balanced enough for very critical listeners.

8.9 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:
JBL E50BT 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
:
2.2 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
:
10 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
:
2.34 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
:
2.39 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
:
1.49 dB

Good Bass Range performance. Low-bass and bass are over-emphasized by about 5dB, which makes the sound a bit bass-heavy. High-bass, on the other hand, is less emphasized and more neutral than the lower frequencies.

6.8 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:
JBL E50BT 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
:
4.28 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
:
-5.88 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
:
-1.5 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
:
2.9 dB

Decent Mid Range performance. Low-mid has a 6dB dip centering around 400Hz. This tends to thin out vocals/leads and decrease the overall warmth of the sound. The rest of the Mid Range is quite consistent and balanced.

7.7 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:
JBL E50BT 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
:
3.79 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
:
1.06 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
:
-0.34 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
:
-4.29 dB

Average Treble Range performance. Low-treble is quite balanced and consistent, except for the negligible narrow dip around 4KHz. In Treble, there is 5dB dip surrounding 6KHz which will have negative effects on presence and detail of vocals/leads. The bump in the high parts of Treble indicates a bit of sibilance and harshness to the high frequencies.

5.6 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:
  • 100% Avg. Std. Deviation
JBL E50BT Consistency L JBL E50BT 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
:
1.17 dB

6.6 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
:
4.25 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
:
5.5
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
:
3.5
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
:
0.0 dB

Average Soundstage. Despite the small opening on the drivers of these headphones, the PRTF score is decent. They also score about average in openness, which means these headphones won't sound as closed as noise-cancelling headphones, but not as open and immersive as open-back headphones either.

6.2 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.
JBL E50BT 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°
:
47.57 °
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
:
2.18 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
:
3.07 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°
:
47.65 °

Average Imaging. There is significant amount of phase shift throughout the range, however, most of the shift is broadband and therefore less audible. The phase shift and mismatch in high-treble though, will have detrimental effects on the Imaging of these headphones.

7.3 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:
JBL E50BT 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
:
1.009
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
:
5.71

Good Harmonic Distortion performance. The amount of harmonic distortion in the Bass Range is quite elevated, however, harmonic distortion in the lower frequencies are less noticeable. The amount of harmonic distortion in the rest of the range is good, even at higher volumes.

5.2

Isolation

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Score components:

These headphones deliver a subpar isolation performance. They only block noise through the passive isolation the ear cups provide. Unfortunately, due to their awkward fit, they don't prevent noise from seeping into your audio or from leaking and potentially distracting the people around you.  They won't be the ideal headphones for loud, noisy commutes or long flights, and they may be a bit too noisy to use in a library or other quiet environments.

4.5 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:
JBL E50BT 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
:
-10.64 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
:
0.26 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
:
-7.42 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
:
-27.31 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
:
16.57 dB

Poor isolation. Due to the passive isolation and poor fit, these headphones fail to achieve any isolation in the Bass Range. The amount of isolation achieved in the Mid and Treble Ranges are also sub-par.

6.5 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:
JBL E50BT 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
:
42.51 dB

Poor Leakage. The large drivers and poor seal of these headphones cause them to leak a lot. The majority of the leakage is between 800Hz and 5Khz, with a sharp peak in loudness at 1.5KHz.

7.0

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 E50BT  have an excellent wireless range but quite a bit of latency for watching videos. It shouldn't be an issue when streaming audio but they won't be the ideal headphones for gaming or watching movies. They also do not have an app to control the active features or enhance sound. On the upside, they have an above-average battery life. 

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 4.0
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
:
190 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
:
N/A
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
:
55 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
:
186 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.
:
No

The E50BT have a great wireless range. They rarely dropped any audio either indoors and outdoors. They even maintained a stable connection slightly above 50ft when the Bluetooth source was placed in another room. This makes them a good pair of wireless headphones to use around the house or at the office. However, they have the typical hold-to-pair procedure and no NFC so it might get a little tedious to switch between Bluetooth devices.

6.8 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
:
20.5 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
:
2.8 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.
:
No
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.
:
No
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 JBL E50BT have an average battery life. They last around 20 hours which makes them decent headphones to use on a long flight or a road trip. Unfortunately, there is no auto-off timer so if you leave them on they will run out of battery. You also can't use them while they're charging as the power and audio cables share the same port.

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

No compatible app.

In the box

JBL E50BT In the box Picture

  • JBL E50BT  headphones
  • Audio cable
  • USB Cable
  • Manual

Conclusion Amazon CHECK PRICE Right

6.7Mixed 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 JBL E50BT are versatile headphones for everyday casual use. They have an above-average and decently balanced sound. They're also robustly built and seem durable. Unfortunately, the awkward fit of the ear cups poorly isolate listeners from ambient noise and they also leak a lot.
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 good bass, a decent midrange and a moderately spacious soundstage for a closed-back model. They sound punchy and have a satisfactory amount of detail with instruments and vocals. However, they lack a little warmth and are a bit uneven for pure critical listening.
6.3Commute/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:
Subpar for commuting. The odd fit of the ear cups lets a lot of ambient noise seep into your audio which won't be ideal for loud, noisy environments.
6.8Sports/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:
Decent for sports use. They have a great control scheme, a moderately stable fit, and a good wireless range that covers a large area, especially outdoors in direct line of sight. Unfortunately, they're a bit too bulky, to comfortably exercise with.
6.6Office
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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:
Mediocre for office use. If you can get a good seal, these headphones won't leak too much. However, they poorly isolate you from ambient noise and won't be the best headphones to use in a lively or noisy office.
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