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JBL E40 BT Review | 93 Data compared

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  • Avg. price: ~£25
  • Form factor: on-ear
  • Connectivity: wireless
  • Battery life: 16 hours
  • Active noise cancellation (ANC): no

JBL E40 BT review. Compare 93 technical specifications and user reviews to see how it ranks among headphones and if it is worth buying.

4.5

Overall score

What it is: An overall evaluation of the headphones' quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best headphones on the market.

Score components:

80.0%

4.5

Technical Score

20.0%

?

User score

Poor
4.5

Technical Score

What it is: An assessment of the headphones' technical performance, covering key areas such as sound quality, noise cancelling, microphone performance, battery life, comfort, connectivity, features, and build quality.

When it matters: When you want to compare headphones based on technical performance and available features.

Score components:

52.0%

4.8

Sound

20.0%

1.9

Features

10.0%

7.2

Design

8.0%

5.0

Connectivity

6.0%

4.7

Battery

4.0%

6.4

Calls & Controls

Poor
?

User score

What it is: A rating that combines user reviews and the total number of reviews received by the headphones.

When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.

Score components:

70.0%

?

User reviews

30.0%

?

Popularity

  • 5.7
    Gaming

    Score components:

    35.0%

    9.0

    Audio latency

    25.0%

    1.0

    Low-latency game mode

    20.0%

    10

    Can be used as a headset

    12.0%

    1.0

    Noise-canceling microphone

    8.0%

    2.4

    Battery life

  • 3.4
    Travel

    Score components:

    28.0%

    1.0

    Active noise cancellation (ANC)

    24.0%

    2.4

    Battery life

    18.0%

    5.5

    Weight

    16.0%

    10

    Multipoint support

    14.0%

    0.0

    Ambient sound mode

  • 5.0
    Calls

    Score components:

    28.0%

    1.0

    Noise-canceling microphone

    24.0%

    10

    Can be used as a headset

    18.0%

    10

    Multipoint support

    16.0%

    2.4

    Battery life

    14.0%

    1.0

    Companion app

  • 4.2
    Workout

    Score components:

    28.0%

    5.5

    Weight

    24.0%

    1.0

    Water resistance

    20.0%

    4.0

    IP rating

    16.0%

    2.4

    Battery life

    12.0%

    10

    Can be used as a headset

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Best prices in UK

    N/A~ £25

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The JBL Synchros E40BT is an on-ear Bluetooth headset featuring 40mm drivers and a wide frequency response of 10Hz to 24kHz. Key characteristics include ShareMe technology for simultaneous wireless audio streaming to another set of headphones and a built-in lithium-ion battery providing up to 16 hours of playback. Main pros include its lightweight, foldable 205g design with 3D swivel hinges, a high sound pressure level of 114dB for loud output, and the inclusion of a detachable aux cable for passive listening when the battery is depleted. However, common cons include a predominantly plastic construction that may feel fragile, reported discomfort during long listening sessions due to ear pressure, and a lack of punchy sub-bass that may disappoint fans of bass-heavy genres.

Technical Specifications of JBL E40 BT

Technical Score

What it is: An assessment of the headphones' technical performance, covering key areas such as sound quality, noise cancelling, microphone performance, battery life, comfort, connectivity, features, and build quality.

When it matters: When you want to compare headphones based on technical performance and available features.

Score components:

52.0%

?

Sound

20.0%

?

Features

10.0%

?

Design

8.0%

?

Connectivity

6.0%

?

Battery

4.0%

?

Calls & Controls

4.5
JBL E40 BT has a technical score of 4.51 points, which is lower than that of 71.6% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the headphones.

When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.

Score components:

70.0%

0.0

User reviews

30.0%

1.0

Popularity

?
Popularity
What it is: An indicator based on the number of reviews received by the headphones.
When it matters: When you prefer headphones that have already been chosen and reviewed by many other users.
1.0
JBL E40 BT has a popularity of 1 points, which is lower than 72.7% of products in this category.
Ratio quality/price

What it is: An indicator that combines the headphones' overall rating with their cost.

When it matters: When you are looking for headphones that offer a strong balance of performance, features, and price.

Score components:

60.0%

4.5

Overall score

40.0%

10

Price

6.2
JBL E40 BT has a quality-to-price ratio of 6.2 points, which is lower than 74.9% of products in this category.
Active noise cancellation (ANC)
What it is: Reduces background noise using active technology
When it matters: When blocking office, travel, or aircraft noise is a priority.

Importance: HIGH

no
JBL E40 BT does not support active noise cancellation. 27.4% of headphones support active noise cancellation.
Driver type
What it is: Type of speaker driver technology used
When it matters: When the underlying sound character and driver technology matter to you.

Importance: MEDIUM

dynamic
Driver size
What it is: Diameter of the speaker driver unit
When it matters: When you want extra hardware context behind how the headphones may handle bass weight, scale, or overall presentation.

Importance: MEDIUM

40 mm
JBL E40 BT uses a driver size of 40 mm, larger driver size than 28.2% of headphones and equal to 53.6% of headphones.
Number of drivers
What it is: Total number of speaker drivers per earcup
When it matters: When multi-driver designs are part of your buying criteria.

Importance: LOW

1
JBL E40 BT uses 1 drivers, equal to 96% of headphones.
Lowest frequency
What it is: Lowest audio frequency the headphones can reproduce
When it matters: When deeper bass extension matters for your music or movie listening.

Importance: MEDIUM

Good value: <=10 Hz

20 Hz
JBL E40 BT reaches a lowest frequency of 20 Hz, higher lowest frequency than 50.6% of headphones and equal to 47.5% of headphones.
Show more
Noise-canceling microphone
What it is: Built-in microphone reduces background noise during calls
When it matters: When you take calls in busy spaces and want your voice to stay clearer.

Importance: MEDIUM

no
JBL E40 BT does not support a noise-canceling microphone. 45.6% of headphones support noise-canceling microphones.
Can be used as a headset
What it is: Shows whether the headphones can handle voice chat and calls in addition to normal audio playback.
When it matters: When one pair needs to cover music, calls, meetings, and gaming chat.

Importance: MEDIUM

yes
JBL E40 BT is headset-ready, 84.7% is not. 15.3% of headphones can be used as headsets.
Number of microphones
What it is: Total number of built-in microphones
When it matters: When call pickup quality and beamforming support matter to you.

Importance: LOW

Good value: >=2

1
JBL E40 BT has 1 microphones, more microphones than 25.9% of headphones and equal to 52.2% of headphones.
Boom microphone
What it is: Includes detachable boom microphone for voice clarity
When it matters: When you need stronger voice clarity for gaming, streaming, or work calls.

Importance: LOW

no
JBL E40 BT does not include a boom microphone. 15.6% of headphones have a boom microphone.
Microphone SNR
What it is: Signal-to-noise ratio of the microphone
When it matters: When call clarity matters and you want your voice picked up more cleanly instead of buried in background hiss.

Importance: LOW

Good value: >80 dB

?
Show more
Connectivity
What it is: Available connection methods (wired, wireless, Bluetooth, etc.)
When it matters: When the headphones need to match how you listen across wired and wireless devices.

Importance: HIGH

wireless
JBL E40 BT supports wireless connectivity, more flexible connectivity than 52.6% of headphones and equal to 47.4% of headphones.
supports both wireless and wired connectivity.
Bluetooth version
What it is: Version of Bluetooth technology supported
When it matters: When wireless stability, efficiency, and feature support matter more than treating Bluetooth as a box-check spec.

Importance: MEDIUM

Good value: >=5.0

3.0
JBL E40 BT uses Bluetooth version 3.0, newer Bluetooth version than 55.7% of headphones and equal to 1.6% of headphones.
Maximum Bluetooth range
What it is: Maximum wireless operating distance from source device
When it matters: When you move around rooms and want fewer dropouts from your source device.

Importance: LOW

Good value: >=10 m

10 m
JBL E40 BT offers a Bluetooth range of 10 m, higher Bluetooth range than 2.6% of headphones and equal to 79.9% of headphones.
Audio latency
What it is: Delay between audio and video in wireless mode
When it matters: When you watch video or play games and need sound to stay in sync.

Importance: HIGH

Good value: <60 ms

?
Multipoint support
What it is: Supports simultaneous connections to multiple devices
When it matters: When you switch often between a phone and a laptop during the day.

Importance: MEDIUM

yes
JBL E40 BT supports multipoint. 35% of headphones support multipoint.
Show more
Ambient sound mode
What it is: Allows external sounds to pass through for awareness
When it matters: When you need to stay aware of traffic, voices, or announcements.

Importance: MEDIUM

N/A
EQ support
What it is: Allows customization of sound profile via equalizer
When it matters: When the stock tuning is not enough and you want to shape bass, mids, or treble to match your taste.

Importance: MEDIUM

no
JBL E40 BT does not support EQ customization. 23.3% of headphones support EQ.
Companion app
What it is: Dedicated mobile app for customization and updates
When it matters: When software customization, updates, and extra controls matter.

Importance: MEDIUM

no
JBL E40 BT does not work with a companion app. 44.4% of headphones support companion apps.
Adjustable ANC levels
What it is: Allows adjustment of noise cancellation intensity levels
When it matters: When you move between quiet rooms, offices, streets, and public transport and do not want one ANC setting for every situation.

Importance: LOW

Good value: >=4

N/A
Voice assistant support
What it is: Compatible with voice assistants like Siri, Alexa, or Google Assistant
When it matters: When hands-free control is part of your daily routine.

Importance: LOW

no
JBL E40 BT does not support voice assistants. 60.9% of headphones support voice assistants.
Show more
Battery life
What it is: Playback time on a single charge
When it matters: When you commute, travel, or work long shifts and do not want charging breaks to interrupt listening.

Importance: HIGH

Good value: >45 hours

16 hours
JBL E40 BT offers battery life of 16 hours, lower battery life than 77.3% of headphones and equal to 2.4% of headphones.
Battery life with ANC
What it is: Playback time with active noise cancellation enabled
When it matters: When you plan to keep noise cancellation on for most of the day.

Importance: HIGH

Good value: >40 hours

N/A
Charging time
What it is: Time required for a full battery charge
When it matters: When you often need the headphones ready again after short breaks.

Importance: MEDIUM

Good value: <=2 hours

3 hours
JBL E40 BT needs 3 hours to charge, higher charging time than 66% of headphones and equal to 21.3% of headphones.
Quick charge
What it is: Provides quick playback time with short charging period
When it matters: When a short top-up needs to deliver useful playback before you leave.

Importance: MEDIUM

?
Battery capacity
What it is: Total energy storage of the internal battery
When it matters: When you are estimating how much battery headroom the design may have before relying only on the official runtime claim.

Importance: MEDIUM

Good value: >=720 mAh

610 mAh
JBL E40 BT has a battery capacity of 610 mAh, higher battery capacity than 57% of headphones and equal to 3% of headphones.
Show more
Brand name
What it is: The manufacturer or brand of the product.
When it matters: When you prefer a specific ecosystem, support network, or design philosophy.

Importance: MEDIUM

JBL
Form factor
What it is: Overall design type of the headphones (over-ear, on-ear, in-ear, etc.)
When it matters: When comfort, portability, and isolation depend on the overall headphone style.

Importance: HIGH

on-ear
Weight
What it is: Total weight of the headphones
When it matters: When long listening sessions make wearing comfort more important.

Importance: MEDIUM

Good value: <150 g

205 g
JBL E40 BT weighs 205 g, lighter than 53.4% of headphones and equal to 0.5% of headphones.
Acoustic design
What it is: Type of acoustic design (open-back, closed-back, semi-open)
When it matters: When you need the right balance of isolation, leakage, and soundstage.

Importance: HIGH

closed-back
Clamp force
What it is: Amount of clamping pressure applied to the head
When it matters: When comfort and fit security matter during long sessions.

Importance: MEDIUM

?
Show more

JBL E40 BT vs the average headphone

  • 12 dB/mW higher sensitivity
    JBL E40 BT has a higher sensitivity than the average headphone (114 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    What it is: Sound pressure output level per unit of input power
    When it matters: When you plan to use weaker sources like phones, handhelds, or entry-level dongles and still want enough volume.

    Importance: MEDIUM

    Good value: >=106 dB/mW

    JBL E40 BT has a higher sensitivity than the average headphone (114 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.114 dB/mW vs 102 dB/mW
  • More flexible connectivity
    JBL E40 BT offers more flexible connectivity than the average headphone (wireless vs wired). The average headphones support wired connectivity.
    supports both wireless and wired connectivity.
    What it is: Available connection methods (wired, wireless, Bluetooth, etc.)
    When it matters: When the headphones need to match how you listen across wired and wireless devices.

    Importance: HIGH

    JBL E40 BT offers more flexible connectivity than the average headphone (wireless vs wired). The average headphones support wired connectivity.wireless vs wired
  • On-device controls
    JBL E40 BT includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
    What it is: Physical controls available directly on headphones
    When it matters: When you need playback, volume, or call controls to be easy to reach without pulling out your phone.

    Importance: MEDIUM

    JBL E40 BT includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
  • In-line controls
    JBL E40 BT includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
    What it is: Controls available on in-line remote of wired cable
    When it matters: When your wired setup depends on cable-mounted buttons or call controls.

    Importance: LOW

    JBL E40 BT includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
  • Foldable design
    JBL E40 BT has a foldable design, the average headphone does not. 61% of headphones are foldable.
    What it is: Earcups or headband can fold for compact storage
    When it matters: When you travel often and want easier storage in a bag.

    Importance: LOW

    JBL E40 BT has a foldable design, the average headphone does not. 61% of headphones are foldable.
  • 3.6x cheaper
    JBL E40 BT is cheaper than the average headphone (£25 vs £90).
    JBL E40 BT is cheaper than the average headphone (£25 vs £90).£25 vs £90
  • Rechargeable battery
    JBL E40 BT has a rechargeable battery, the average headphone does not. 47.9% of headphones have a rechargeable battery.
    What it is: Shows whether the headphones rely on an internal rechargeable battery instead of replaceable disposable cells.
    When it matters: When you expect regular wireless use and want charging convenience instead of buying and replacing disposable batteries.

    Importance: MEDIUM

    JBL E40 BT has a rechargeable battery, the average headphone does not. 47.9% of headphones have a rechargeable battery.
  • 2,000 Hz higher treble extension
    JBL E40 BT has a higher highest frequency than the average headphone (22,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
    What it is: Highest audio frequency the headphones can reproduce
    When it matters: When treble extension and overall frequency reach matter to you.

    Importance: MEDIUM

    Good value: >=24000 Hz

    JBL E40 BT has a higher highest frequency than the average headphone (22,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.22000 Hz vs 20000 Hz
  • Foldable design
    JBL E40 BT has a foldable design, the average headphone does not. 61% of headphones are foldable.
  • 12 dB/mW higher sensitivity
    JBL E40 BT has a higher sensitivity than the average headphone (114 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
  • 2,000 Hz higher treble extension
    JBL E40 BT has a higher highest frequency than the average headphone (22,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
  • 11 dB SPL higher sound pressure level
    JBL E40 BT has a higher sound pressure level than the average headphone (114 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.
  • Rechargeable battery
    JBL E40 BT has a rechargeable battery, the average headphone does not. 47.9% of headphones have a rechargeable battery.
  • More flexible connectivity
    JBL E40 BT offers more flexible connectivity than the average headphone (wireless vs wired). The average headphones support wired connectivity.
  • On-device controls
    JBL E40 BT includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
  • In-line controls
    JBL E40 BT includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.

Total
Overall
Design
Sound
Battery
Connectivity
Calls & Controls
  • 14 mm tighter earcup width
    JBL E40 BT has tighter earcup width than the average headphone (29 mm vs 43 mm). The average headphones offer an inner earcup width of 43 mm.
  • 2 Hz weaker bass extension
    JBL E40 BT has a higher lowest frequency than the average headphone (20 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
  • 0.2 % higher distortion
    JBL E40 BT has a higher total harmonic distortion than the average headphone (0.5 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.
  • 1 hours longer charging time
    JBL E40 BT has a higher charging time than the average headphone (3 hours vs 2 hours). The average headphones need 2 hours to charge.
  • 14 hours shorter battery life
    JBL E40 BT has a lower battery life than the average headphone (16 hours vs 30 hours). The average headphones offer battery life of 30 hours.
  • No voice assistant support
    JBL E40 BT does not support voice assistants, the average headphone does. 60.8% of headphones support voice assistants.
  • 1 hours longer charging time
    JBL E40 BT has a higher charging time than the average headphone (3 hours vs 2 hours). The average headphones need 2 hours to charge.
    What it is: Time required for a full battery charge
    When it matters: When you often need the headphones ready again after short breaks.

    Importance: MEDIUM

    Good value: <=2 hours

    JBL E40 BT has a higher charging time than the average headphone (3 hours vs 2 hours). The average headphones need 2 hours to charge.3 hours vs 2 hours
  • No voice assistant support
    JBL E40 BT does not support voice assistants, the average headphone does. 60.8% of headphones support voice assistants.
    What it is: Compatible with voice assistants like Siri, Alexa, or Google Assistant
    When it matters: When hands-free control is part of your daily routine.

    Importance: LOW

    JBL E40 BT does not support voice assistants, the average headphone does. 60.8% of headphones support voice assistants.
  • 14 hours shorter battery life
    JBL E40 BT has a lower battery life than the average headphone (16 hours vs 30 hours). The average headphones offer battery life of 30 hours.
    What it is: Playback time on a single charge
    When it matters: When you commute, travel, or work long shifts and do not want charging breaks to interrupt listening.

    Importance: HIGH

    Good value: >45 hours

    JBL E40 BT has a lower battery life than the average headphone (16 hours vs 30 hours). The average headphones offer battery life of 30 hours.16 hours vs 30 hours
  • 2 Hz weaker bass extension
    JBL E40 BT has a higher lowest frequency than the average headphone (20 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    What it is: Lowest audio frequency the headphones can reproduce
    When it matters: When deeper bass extension matters for your music or movie listening.

    Importance: MEDIUM

    Good value: <=10 Hz

    JBL E40 BT has a higher lowest frequency than the average headphone (20 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.20 Hz vs 18 Hz
  • 14 mm tighter earcup width
    JBL E40 BT has tighter earcup width than the average headphone (29 mm vs 43 mm). The average headphones offer an inner earcup width of 43 mm.
    What it is: Internal width of the earcup cavity
    When it matters: When earcup fit affects comfort and pressure around your ears.

    Importance: MEDIUM

    JBL E40 BT has tighter earcup width than the average headphone (29 mm vs 43 mm). The average headphones offer an inner earcup width of 43 mm.29 mm vs 43 mm
  • 4.65x less popular
    JBL E40 BT is less popular than the average headphone (1.00 vs 4.646).
    What it is: An indicator based on the number of reviews received by the headphones.
    When it matters: When you prefer headphones that have already been chosen and reviewed by many other users.
    JBL E40 BT is less popular than the average headphone (1.00 vs 4.646).1 vs 4.65
  • 0.2 % higher distortion
    JBL E40 BT has a higher total harmonic distortion than the average headphone (0.5 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.
    What it is: Percentage of harmonic distortion in audio output
    When it matters: When cleaner sound reproduction matters at louder volumes.

    Importance: LOW

    Good value: <=1%

    JBL E40 BT has a higher total harmonic distortion than the average headphone (0.5 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.0.5 % vs 0.3 %
  • 9.4% worse value for money
    JBL E40 BT has worse value for money than the average headphone (6.16 vs 6.736).
    What it is: An indicator that combines the headphones' overall rating with their cost.
    When it matters: When you are looking for headphones that offer a strong balance of performance, features, and price.
    JBL E40 BT has worse value for money than the average headphone (6.16 vs 6.736).6.16 vs 6.74
Total
Overall
Design
Sound
Battery
Features

Graphic comparison of JBL E40 BT and

Attribute category
Attribute
No results found

Third-party reviews

What customers like about JBL E40 BT?

  • Battery life is stellar, often reaching the advertised 16 hours of continuous playback
  • Balanced sound profile with clear mid-range performance and crisp high tones
  • Unique ShareMe feature allows streaming audio wirelessly to another compatible JBL headset
  • Lightweight and stylish design available in multiple color options
  • Stable Bluetooth connectivity with a respectable range for wireless use
  • On-ear controls are conveniently located for volume and track management

What customers dislike about JBL E40 BT?

  • Build quality feels somewhat cheap and fragile due to extensive use of plastic
  • On-ear fit can be overly snug and may cause discomfort during long listening sessions
  • Bass output is often described as lacking punch or being too subtle for bass-heavy genres
  • Charging cable uses a proprietary 2.5mm jack rather than standard micro-USB or USB-C
  • Significant sound leakage occurs at higher volumes, which may disturb people nearby

Expert reviews

L
letemsvetemapplem.eu
10/04/2016
JBL Synchros E40BT Review: Small Headphones with Big Sound

The JBL Synchros E40BT is a lightweight, wireless on-ear headphone option praised for delivering well-balanced, clear sound with prominent highs, making it an excellent budget-friendly choice for undemanding listeners or vocal-heavy tracks. It stands out in its price tier for having a exceptionally high maximum volume, strong noise isolation, and a reliable lithium-ion battery that...Read more

I
ilounge.com
19/05/2021
Review: JBL Synchros E40BT On-Ear Headphones

The JBL Synchros E40BT is an on-ear wireless headphone priced at $100 that balances functional design with reliable performance. Aesthetic and structural pros include a modern industrial design with diamond-textured plastic accents, heavily padded leatherette cushions, and rotating ear cups that provide a highly comfortable fit without exerting excessive pressure. On the performance...Read more

G
geekdad.com
25/08/2014
Product Review: JBL Synchros E40BT Bluetooth Headphones

The JBL Synchros E40BT is an over-ear wireless Bluetooth headphone model praised for its lightweight build and high level of comfort, making it suitable for up to four hours of continuous desk wear without fatigue. A key benefit is its impressive battery performance, delivering up to 16 hours of music playback from a three-hour charge, alongside a "ShareMe" feature that allows...Read more

T
techwelike.com
15/07/2014
JBL Synchros E40BT Wireless Headphones Review

The JBL Synchros E40BT wireless headphones review by Analie Cruz outlines a hip and colorful choice for budget-conscious buyers at a price point of $99.95. A standout feature is the unique ShareMe tech that lets you split music from one phone with another paired set of JBL headphones. The setup is smooth, and the built-in battery offers a solid 16 hours of continuous playtime,...Read more

T
techradar.com
18/09/2014
JBL Synchros E40BT review

The JBL Synchros E40BT is an affordable on-ear Bluetooth headset that delivers surprisingly clear and punchy sound for its price point, particularly excelling with mid-range performance and synthetic tracks. Its design is functional and portable, featuring earcups that fold via 3D hinges, though the build quality can feel somewhat cheap and the prominent branding may be off-putting...Read more

L
letemsvetemapplem.eu
10/04/2016
JBL Synchros E40BT Review: Small Headphones with Big Sound

The JBL Synchros E40BT is a lightweight, on-ear wireless headphone model that features a completely closed design with comfortable textile ear cushions, though its tight plastic frame can cause initial pressure on the ears. Perfect for casual listening and commuting, it blocks outside noise effectively and features an easy Bluetooth pairing process alongside a built-in microphone...Read more

(Translated)Show original
S
sonntagmorgen.com
01/04/2026
JBL E40BT Wireless Review 2026 - Sunday Morning

The JBL E40BT is a lightweight, on-ear wireless Bluetooth headphone designed for mobile use, weighing roughly 200 grams and featuring a collapsible, rotating design for easy transport. Priced around €119.90, it features a durable build that withstands tight storage spaces, a user-friendly control interface integrated into the left ear cup, and a respectable battery life of up to 16...Read more

(Translated)Show original
K
kopfhoerer.de
21. März 2016
JBL Synchros E40BT review on kopfhoerer.de

The JBL Synchros E40BT is an affordable, lightweight pair of on-ear Bluetooth headphones weighing 199 grams that offers a compact, unified sound profile with prominent high mids, though it lacks deep sub-bass and crisp high frequencies. Retailing at a street price of 90 Euros, its standout feature is "ShareMe" technology, which allows two compatible headsets to stream audio...Read more

(Translated)Show original
0
01net.com
10/06/2014
Review: JBL Synchros E40BT, an affordable but uncomfortable Bluetooth headset

The JBL Synchros E40BT is an entry-level, supra-aural Bluetooth headset that offers strong battery performance and practical functionality for its budget-friendly price of approximately €100. On the positive side, the device boasts an impressive battery life of nearly 20 hours of continuous playback. Its design is visually appealing, offering four color choices, and featuring...Read more

(Translated)Show original
0
01net.com
No specific review date (Fiche Technique)
JBL Synchros E40BT - Specifications

The JBL Synchros E40BTGo is an affordable, entry-level on-ear portable headset reviewed by 01net. Priced at approximately €99.99, this model offers dual functionality, operating via both a wireless Bluetooth connection and a detachable 1.25-metre 3.5 mm audio jack cable. On the positive side (pros), the review highlights an impressive battery performance, noting that while the...Read more

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L
letemsvetemapplem.eu
10/04/2016
JBL Synchros E40BT Review: Small Headphones with Surprisingly Clear Sound

The JBL Synchros E40BT is a lightweight, on-ear wireless headphone set featuring an adjustable design and thick textile ear cushioning that successfully blocks out external ambient noise. It relies on a very simple, single-button Bluetooth pairing process and offers an exceptionally loud maximum volume alongside a well-balanced, clear sound profile where higher frequencies and...Read more

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T
tweakers.net
06/04/2016
JBL Synchros E40BT Black - Stranger__NL - Product reviews

The JBL Synchros E40BT review on Tweakers rates the headphones poorly with 2 out of 5 stars, noting significant build quality issues after just one week of intensive use. Positive aspects highlighted include the convenient wireless Bluetooth capability, a comfortable fit, solid battery life, and a versatile charging cable. However, the user reports critical hardware defects,...Read more

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