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JBL Synchros S400bt Review | 93 Data compared

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  • Avg. price: ~£200
  • Form factor: on-ear
  • Connectivity: wireless
  • Battery life: 15 hours
  • Active noise cancellation (ANC): no

JBL Synchros S400bt review. Compare 93 technical specifications and user reviews to see how it ranks among headphones and if it is worth buying.

5.6

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%

5.1

Technical Score

20.0%

7.4

User score

Good
5.1

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%

5.1

Sound

20.0%

4.0

Features

10.0%

6.2

Design

8.0%

4.8

Connectivity

6.0%

6.2

Battery

4.0%

8.3

Calls & Controls

Good
7.4

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%

8.4

User reviews

30.0%

5.0

Popularity

User score:
United Kingdom
amazon
4.2
(139)
United States
Amazon_logo.png
4.2
(139)

(Reviews last updated: June 2026)

Very good
  • 9.1
    Gaming

    Score components:

    35.0%

    10

    Audio latency

    25.0%

    9.0

    Low-latency game mode

    20.0%

    10

    Can be used as a headset

    12.0%

    10

    Noise-canceling microphone

    8.0%

    2.2

    Battery life

  • 1.7
    Travel

    Score components:

    28.0%

    1.0

    Active noise cancellation (ANC)

    24.0%

    2.2

    Battery life

    18.0%

    3.8

    Weight

    16.0%

    1.0

    Multipoint support

    14.0%

    0.0

    Ambient sound mode

  • 5.9
    Calls

    Score components:

    28.0%

    10

    Noise-canceling microphone

    24.0%

    10

    Can be used as a headset

    18.0%

    1.0

    Multipoint support

    16.0%

    2.2

    Battery life

    14.0%

    1.0

    Companion app

  • 5.6
    Workout

    Score components:

    28.0%

    3.8

    Weight

    24.0%

    9.0

    Water resistance

    20.0%

    4.0

    IP rating

    16.0%

    2.2

    Battery life

    12.0%

    10

    Can be used as a headset

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Best rankings

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

Verdict

The JBL Synchros S400BT is a premium on-ear wireless headphone featuring 40mm drivers and a frequency response of 10Hz to 22kHz, delivering signature JBL PureBass performance with aptX and Bluetooth 3.0 support. Its key characteristics include a durable steel headband, plush leather ear cushions for comfort, and a unique touch-sensitive interface on the left earcup that features an intuitive LED light trail to track finger gestures for volume, track, and call management. Main pros include NFC tap-to-pair technology, a reliable 15-hour battery life for music playback, and a collapsible 3D-axis design for easy portability. However, some users have noted cons such as a bass-heavy sound profile that can occasionally overpower mid-range details, a proprietary 2.5mm charging cable, and touch controls that can be overly sensitive to accidental taps.

Technical Specifications of JBL Synchros S400bt

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%

5.1

Sound

20.0%

4.0

Features

10.0%

6.2

Design

8.0%

4.8

Connectivity

6.0%

6.2

Battery

4.0%

8.3

Calls & Controls

5.1
JBL Synchros S400bt has a technical score of 5.14 points, which is higher than that of 57.9% 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%

8.4

User reviews

30.0%

5.0

Popularity

User score:
United Kingdom
amazon
4.2
(139)
United States
Amazon_logo.png
4.2
(139)

(Reviews last updated: June 2026)

7.4
JBL Synchros S400bt has a user score of 7.39 points, which is lower than that of 71.4% of products in this category.
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.
5.0
JBL Synchros S400bt has a popularity of 5 points, which is higher than 51.6% 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%

5.6

Overall score

40.0%

9.5

Price

6.8
JBL Synchros S400bt has a quality-to-price ratio of 6.8 points, which is higher than 51% 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 Synchros S400bt 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 Synchros S400bt 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 Synchros S400bt 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

10 Hz
JBL Synchros S400bt reaches a lowest frequency of 10 Hz, lower lowest frequency than 67.3% of headphones and equal to 12.5% 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

yes
JBL Synchros S400bt supports a noise-canceling microphone. 54.5% 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 Synchros S400bt 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 Synchros S400bt 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 Synchros S400bt 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

?
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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 Synchros S400bt 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 Synchros S400bt 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 Synchros S400bt 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

40 ms
JBL Synchros S400bt has audio latency of 40 ms, lower audio latency than 74.7% of headphones and equal to 15.5% of headphones.
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

no
JBL Synchros S400bt does not support multipoint. 65.1% 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

?
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 Synchros S400bt 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

yes
JBL Synchros S400bt supports voice assistants. 39.2% 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

15 hours
JBL Synchros S400bt offers battery life of 15 hours, lower battery life than 79.8% of headphones and equal to 3.9% 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

2 hours
JBL Synchros S400bt needs 2 hours to charge, lower charging time than 48.5% of headphones and equal to 39.1% 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

yes
JBL Synchros S400bt supports quick charge. 31% of headphones support quick charge.
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 Synchros S400bt 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

275 g
JBL Synchros S400bt weighs 275 g, heavier than 72% 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

?
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JBL Synchros S400bt vs the average headphone

  • 13 dB/mW higher sensitivity
    JBL Synchros S400bt has a higher sensitivity than the average headphone (115 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 Synchros S400bt has a higher sensitivity than the average headphone (115 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.115 dB/mW vs 102 dB/mW
  • More flexible connectivity
    JBL Synchros S400bt 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 Synchros S400bt offers more flexible connectivity than the average headphone (wireless vs wired). The average headphones support wired connectivity.wireless vs wired
  • Clear call microphone
    JBL Synchros S400bt offers a clear call microphone, while the average headphone does not. 45.6% of headphones support noise-canceling microphones.
    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

    JBL Synchros S400bt offers a clear call microphone, while the average headphone does not. 45.6% of headphones support noise-canceling microphones.
  • 87.5 ms lower audio latency
    JBL Synchros S400bt has a lower audio latency than the average headphone (40 ms vs 127.5 ms). The average headphones have audio latency of 127.5 ms.
    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

    JBL Synchros S400bt has a lower audio latency than the average headphone (40 ms vs 127.5 ms). The average headphones have audio latency of 127.5 ms.40 ms vs 127.5 ms
  • 8 Hz lower bass extension
    JBL Synchros S400bt has a lower lowest frequency than the average headphone (10 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 Synchros S400bt has a lower lowest frequency than the average headphone (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.10 Hz vs 18 Hz
  • On-device controls
    JBL Synchros S400bt 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 Synchros S400bt includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
  • Wind noise reduction
    JBL Synchros S400bt reduces wind noise, the average headphone does not. 34.1% of headphones support wind noise reduction.
    What it is: Reduces wind interference for clearer outdoor calls
    When it matters: When you take calls outdoors while walking, cycling, or commuting.

    Importance: LOW

    JBL Synchros S400bt reduces wind noise, the average headphone does not. 34.1% of headphones support wind noise reduction.
  • Foldable design
    JBL Synchros S400bt 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 Synchros S400bt has a foldable design, the average headphone does not. 61% of headphones are foldable.
  • Foldable design
    JBL Synchros S400bt has a foldable design, the average headphone does not. 61% of headphones are foldable.
  • 13 dB/mW higher sensitivity
    JBL Synchros S400bt has a higher sensitivity than the average headphone (115 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
  • 8 Hz lower bass extension
    JBL Synchros S400bt has a lower lowest frequency than the average headphone (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
  • 2,000 Hz higher treble extension
    JBL Synchros S400bt 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.
  • 12 dB SPL higher sound pressure level
    JBL Synchros S400bt has a higher sound pressure level than the average headphone (115 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.
  • Rechargeable battery
    JBL Synchros S400bt has a rechargeable battery, the average headphone does not. 47.9% of headphones have a rechargeable battery.
  • More flexible connectivity
    JBL Synchros S400bt offers more flexible connectivity than the average headphone (wireless vs wired). The average headphones support wired connectivity.
  • 87.5 ms lower audio latency
    JBL Synchros S400bt has a lower audio latency than the average headphone (40 ms vs 127.5 ms). The average headphones have audio latency of 127.5 ms.
  • Clear call microphone
    JBL Synchros S400bt offers a clear call microphone, while the average headphone does not. 45.6% of headphones support noise-canceling microphones.
  • On-device controls
    JBL Synchros S400bt includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
  • Wind noise reduction
    JBL Synchros S400bt reduces wind noise, the average headphone does not. 34.1% of headphones support wind noise reduction.
  • Sidetone support
    JBL Synchros S400bt supports sidetone, the average headphone does not. 29.7% of headphones support sidetone.
  • Quick mic mute
    JBL Synchros S400bt includes a quick mic mute, the average headphone does not. 33.5% of headphones support a mute function.

Total
Design
Sound
Battery
Connectivity
Calls & Controls
  • 26.1% higher weight
    JBL Synchros S400bt is heavier than the average headphone (275 g vs 218 g). The average pair of headphones weighs 218 g.
  • 28 mm tighter earcup height
    JBL Synchros S400bt has tighter earcup height than the average headphone (32 mm vs 60 mm). The average headphones offer an inner earcup height of 60 mm.
  • Tangle-prone cable
    JBL Synchros S400bt uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
  • 15 hours shorter battery life
    JBL Synchros S400bt has a lower battery life than the average headphone (15 hours vs 30 hours). The average headphones offer battery life of 30 hours.
  • 26.1% higher weight
    JBL Synchros S400bt is heavier than the average headphone (275 g vs 218 g). The average pair of headphones weighs 218 g.
    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

    JBL Synchros S400bt is heavier than the average headphone (275 g vs 218 g). The average pair of headphones weighs 218 g.275 g vs 218 g
  • 28 mm tighter earcup height
    JBL Synchros S400bt has tighter earcup height than the average headphone (32 mm vs 60 mm). The average headphones offer an inner earcup height of 60 mm.
    What it is: Internal height of the earcup cavity
    When it matters: When larger ears need enough space inside the earcups.

    Importance: MEDIUM

    JBL Synchros S400bt has tighter earcup height than the average headphone (32 mm vs 60 mm). The average headphones offer an inner earcup height of 60 mm.32 mm vs 60 mm
  • 15 hours shorter battery life
    JBL Synchros S400bt has a lower battery life than the average headphone (15 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 Synchros S400bt has a lower battery life than the average headphone (15 hours vs 30 hours). The average headphones offer battery life of 30 hours.15 hours vs 30 hours
  • Tangle-prone cable
    JBL Synchros S400bt uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
    What it is: Cable designed to resist tangling
    When it matters: When you often carry wired headphones in a bag or pocket.

    Importance: LOW

    JBL Synchros S400bt uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
  • 2.22x more expensive
    JBL Synchros S400bt is more expensive than the average headphone (£200 vs £90).
    JBL Synchros S400bt is more expensive than the average headphone (£200 vs £90).£200 vs £90
  • 8.2% lower user score
    JBL Synchros S400bt has a lower user score than the average headphone (7.39 vs 8.000).
    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.
    JBL Synchros S400bt has a lower user score than the average headphone (7.39 vs 8.000).7.39 vs 8
Total
Overall
Design
Battery

Graphic comparison of JBL Synchros S400bt and

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Third-party reviews

United Kingdom
amazon
4.2
139 Reviews
United States
Amazon_logo.png
4.2
139 Reviews

(Reviews last updated: June 2026)

What customers like about JBL Synchros S400bt?

  • Powerful and punchy bass performance ideal for 'bassheads'
  • Comfortable on-ear fit with plush leather cushions for long listening sessions
  • Sturdy and durable build quality featuring a stainless steel headband
  • Convenient touch-sensitive controls on the earcup with a unique LED light trail
  • Highly portable design that allows the earcups to fold and rotate
  • Solid battery life, typically lasting around 14 to 15 hours
  • Includes a detachable cable for optional wired listening

What customers dislike about JBL Synchros S400bt?

  • Overpowering bass can sometimes overwhelm subtle details in the midrange and treble
  • Occasional Bluetooth connectivity issues and limited signal range
  • Touch controls can be overly sensitive, leading to accidental pauses or skipped tracks
  • Proprietary charging system that uses the 2.5mm/3.5mm jack instead of standard USB
  • Sound leakage can occur if the earcup seal is broken by head movement
  • Lack of active noise cancellation (ANC) and poor passive noise isolation
  • Relatively high price point compared to newer or similar wireless models

Expert reviews

A
ayocrose.wordpress.com
16/03/2016
Review: JBL Synchros S400 Bluetooth Headphones Would you like a summary of the pros and cons mentioned across these reviews to see if they fit your ne...

The JBL Synchros S400BT (also referred to as the S400+ BT) are a highly capable pair of wireless on-ear Bluetooth stereo headphones reviewed by Chris Rose on CRDesigns. Available in multiple colors like Black, Black & Gray, and White, these comfortable headphones deliver exceptional sound quality characterized by powerful low-end bass and sharp high-end vocals. Despite having an...Read more

U
uk.pcmag.com
31/03/2014
JBL Synchros S400BT - Review 2014 - PCMag UK

The PCMag UK review of the JBL Synchros S400BT wireless headphones awards the device a 4.0 "Excellent" rating, characterizing it as a bass lover's dream come true. Retailing at $229.95, these on-ear Bluetooth headphones are built with a stainless steel headband, numbered click-stops, and plush padding, ensuring an exceptionally comfortable fit even during long listening sessions....Read more

P
phonearena.com
13/08/2014
JBL Synchros S400BT Review - PhoneArena

The JBL Synchros S400BT is a high-end pair of Bluetooth 3.0 headphones priced at $229.95, designed with a durable stainless steel headband, matte sidings, and a compact, collapsible frame perfect for travel. Its standout features include an NFC chip for effortless pairing, a futuristic LED light trail that animates during use, and touch-sensitive gestures on the left ear cup to...Read more

S
soundvisionreview.com
16/09/2015
JBL Synchros S400BT Review - SoundVisionReview

The JBL Synchros S400BT is a highly portable, on-ear wireless headphone model that offers a premium build and a comfortable fit thanks to its soft earcup padding and a 14-step extendable stainless steel headband. The design allows the earcups to rotate and fold down to the size of a hand, making them ideal for travel. A standout feature is the intuitive, touch-sensitive left earcup,...Read more

W
whathifi.com
09/01/2015
JBL Synchros S400BT review - What Hi-Fi?

The JBL Synchros S400BT wireless headphones offer a sturdy build with a significant amount of heft, featuring earcups that hinge and rotate 180 degrees for easier storage. Performance-wise, they deliver a highly energetic, bombastic, and powerful sound with a heavy emphasis on bass that will easily satisfy "bassheads". Additionally, they include useful modern tech features like an...Read more

T
techradar.com
16/01/2015
JBL Synchros S400BT review - TechRadar

The JBL Synchros S400BT wireless on-ear headphones feature a durable, premium design that blends matte-coated plastic, stainless steel, and a comfortable leather-cushioned headband. Equipped with 40mm drivers, they deliver full, high-quality audio across various music genres, complemented by an impressive battery life that consistently exceeds the advertised 15 hours. The left...Read more

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pcmag.com
28/03/2014
JBL Synchros S400BT Review - PCMag

The PCMag review of the $229.95 JBL Synchros S400BT highlights powerful, distortion-free audio performance for bass lovers, featuring a heavily sculpted sound signature with boosted highs and intense lows. The headphones are described as exceptionally comfortable due to ample cushioning and a stainless steel headband, with the added benefit of a detachable cable for wired use....Read more

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wegotmusic.de
10/09/2015
Coolness Meets Elegance Meets Sound Art: The JBL S400 BT", "Where Cool Meets Elegance and Sonic Art: The JBL S400 BT

The wegotmusic.de review gives a very positive rating to the JBL Synchros S400 BT on-ear headphones. The reviewer praises the excellent build quality, high-end look, and comfortable faux leather padding for long wear. The sound is highly balanced and detailed, driven by two 40mm drivers that deliver strong bass and clear treble up to a loud 115 dB. Notable pros include fast pairing...Read more

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connect.de
24/11/2014
JBL Synchros S400BT Review - Bluetooth Headphones

The JBL Synchros S400 BT is a durable, on-ear Bluetooth headset featuring a foldable metal headband and a convenient, compact transport case. It offers a powerful, high-volume sound experience, capable of delivering energetic performance via both Bluetooth and wired connections, even on an iPhone. While the mids and highs are technically clean, the overall sound is heavily dominated...Read more

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lite-magazin.de
22/08/2014
JBL S400BT – top-tier sound quality via Bluetooth

The JBL Synchros S400BT is a premium, 275-gram wireless on-ear headphone reviewed by lite-Magazin which awards it a perfect 1.0 "outstanding" overall score. The reviewer praises its sophisticated and sturdy blend of black metal, aluminum, and rubberized plastic, noting it provides an exceptionally comfortable, secure fit across various head sizes thanks to a numbered adjustment...Read more

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areadvd.de
28/07/2014
REVIEW: JBL Synchros S400BT Over-Ear Bluetooth Headphones with Touch Control

The JBL Synchros S400BT is an exceptionally powerful, premium Bluetooth over-ear headphone evaluated by AREA DVD as a top price-to-performance contender under €300. Key pros include its robust, high-quality build highlighted by a solid stainless steel headband, a clever folding mechanism that integrates into a compact transport case, and a highly stable Bluetooth 3.0 connection with...Read more

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01net.com
11/02/2014
J46BT and Synchros S400BT: two colourful Bluetooth headphones from JBL

The provided article from 01net.com outlines the release of two colorful Bluetooth headphone models by JBL: the JBL J46BT in-ear headphones and the JBL Synchros S400BT on-ear headset. The JBL J46BT is a lightweight, neckband-style in-ear model tailored for easy mobility. Its key pros include discrete, tangle-free color options (black/orange or white/orange), an inline remote control...Read more

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1casquebluetooth.fr
25/02/2015
JBL Synchros S400BT - Bluetooth Headphones | Reviews, Price & Opinions

The JBL Synchros S400BT is a robust, foldable Bluetooth on-ear headphone designed specifically for bass lovers, retailing around €203 on Amazon. Its premium build highlights include a durable stainless steel headband, generous padding, and 90-degree rotating ear cups that provide excellent passive noise isolation and overall comfort. It features seamless NFC and Bluetooth pairing,...Read more

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audiocasque.fr
13/08/2014
JBL Synchros S400BT / Review / Calling all bass lovers

The JBL Synchros S400BT is a Bluetooth headset specifically engineered for "bass lovers," featuring 40mm drivers that deliver massive low-end power without distortion, even at high volumes. Its design is both stylish and functional, offering a comfortable fit through a stainless steel headband with generous padding and plush ear pads that, while technically on-ear (supra-aural), are...Read more

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01net.com
24/02/2014
JBL Synchros S400BT Review: A Bluetooth Headphone That Puts Bass First

The 01net.com review highlights the JBL Synchros S400BT as an elegant, robust, and highly functional supra-aural wireless headset with an retail price of approximately €230. The primary strengths of this model are its exceptional build quality, featuring a sturdy steel headband, and its remarkable battery life, which exceeded 20 hours of continuous music playback in lab...Read more

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gadgetgear.nl
22/03/2014
Review: JBL Synchros S400BT (Headphones) - GadgetGear.nl

The JBL Synchros S400BT, reviewed by GadgetGear.nl, offers high-quality audio with aptX codec support and effective Pure Bass, making it ideal for dance and urban music. It features robust call quality with echo-canceling technology, though the highly sensitive touch sensor on the ear cup can lead to accidental, unintended inputs. While offering strong performance, the review...Read more

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