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Brainwavz B400 Review | 93 Data compared

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  • Avg. price in UK: ~£150
  • Avg. price in US: ~$190
  • Form factor: in-ear
  • Connectivity: wired
  • Battery life: N/A hours
  • Active noise cancellation (ANC): no

Brainwavz B400 review. Compare 93 technical specifications and user reviews to see how it ranks among headphones and if it is worth buying.

5.7

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%

5.7

Technical Score

20.0%

5.5

User score

Good
5.7

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%

6.3

Sound

20.0%

4.1

Features

10.0%

9.2

Design

8.0%

3.0

Connectivity

6.0%

4.9

Battery

4.0%

4.8

Calls & Controls

Good
5.5

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%

6.5

User reviews

30.0%

3.0

Popularity

User score:
United Kingdom
amazon
3.3
(35)
amazon
3.0
(5)
United States
Amazon_logo.png
3.3
(35)
Amazon_logo.png
3.0
(5)

(Reviews last updated: June 2026)

Good
  • 2.1
    Gaming

    Score components:

    35.0%

    0.0

    Audio latency

    25.0%

    0.0

    Low-latency game mode

    20.0%

    10

    Can be used as a headset

    12.0%

    1.0

    Noise-canceling microphone

    8.0%

    0.0

    Battery life

  • 1.9
    Travel

    Score components:

    28.0%

    1.0

    Active noise cancellation (ANC)

    24.0%

    0.0

    Battery life

    18.0%

    9.0

    Weight

    16.0%

    0.0

    Multipoint support

    14.0%

    0.0

    Ambient sound mode

  • 2.7
    Calls

    Score components:

    28.0%

    1.0

    Noise-canceling microphone

    24.0%

    10

    Can be used as a headset

    18.0%

    0.0

    Multipoint support

    16.0%

    0.0

    Battery life

    14.0%

    0.0

    Companion app

  • 5.8
    Workout

    Score components:

    28.0%

    9.0

    Weight

    24.0%

    1.0

    Water resistance

    20.0%

    9.0

    IP rating

    16.0%

    0.0

    Battery life

    12.0%

    10

    Can be used as a headset

  • brainwavz-b400
  • brainwavz-b400
  • brainwavz-b400
  • brainwavz-b400
brainwavz-b400
brainwavz-b400
brainwavz-b400
brainwavz-b400

Best prices in UK

Best rankings

?

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

Verdict

The Brainwavz B400 is a high-performance in-ear monitor featuring a unique 3D-printed liquid resin housing and a quad balanced armature driver configuration (one high, two mids, one bass). It delivers a smooth, natural sound signature with technical specifications including a frequency response of 10Hz to 40kHz, 30Ω impedance, and 115dB sensitivity. Main pros include its exceptional midrange clarity, comfortable ergonomic fit for long sessions, and a generous accessory package featuring detachable MMCX cables. Notable cons include a slight lack of sub-bass punch compared to dynamic drivers and a plastic shell finish that some users find less premium.

Technical Specifications of Brainwavz B400

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%

6.3

Sound

20.0%

4.1

Features

10.0%

9.2

Design

8.0%

3.0

Connectivity

6.0%

4.9

Battery

4.0%

4.8

Calls & Controls

5.7
Brainwavz B400 has a technical score of 5.74 points, which is higher than that of 70.1% 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%

6.5

User reviews

30.0%

3.0

Popularity

User score:
United Kingdom
amazon
3.3
(35)
amazon
3.0
(5)
United States
Amazon_logo.png
3.3
(35)
Amazon_logo.png
3.0
(5)

(Reviews last updated: June 2026)

5.5
Brainwavz B400 has a user score of 5.47 points, which is lower than that of 97.4% 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.
3.0
Brainwavz B400 has a popularity of 3 points, which is lower than 60.4% 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%

5.7

Overall score

40.0%

9.7

Price

6.9
Brainwavz B400 has a quality-to-price ratio of 6.9 points, which is higher than 57% 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
Brainwavz B400 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

balanced armature
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

?
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

4
Brainwavz B400 uses 4 drivers, more drivers than 99.2% of headphones and equal to 0.5% 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
Brainwavz B400 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

no
Brainwavz B400 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
Brainwavz B400 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
Brainwavz B400 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
Brainwavz B400 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

wired
Brainwavz B400 supports wired connectivity, equal to 52.6% of headphones.
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

5.0
Brainwavz B400 uses Bluetooth version 5.0, newer Bluetooth version than 70.9% of headphones and equal to 13% 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
Brainwavz B400 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

N/A
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

N/A
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
Brainwavz B400 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

N/A
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
Brainwavz B400 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

N/A
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

N/A
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

N/A
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

N/A
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

Brainwavz
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

in-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

?
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

N/A
Show more

Brainwavz B400 vs the average headphone

  • Hi-Res Audio certification
    Brainwavz B400 has Hi-Res Audio certification, the average headphone does not. 22.9% of headphones are Hi-Res Audio certified.
    What it is: Certified for high-resolution audio playback
    When it matters: When official support for high-resolution playback matters to you.

    Importance: LOW

    Brainwavz B400 has Hi-Res Audio certification, the average headphone does not. 22.9% of headphones are Hi-Res Audio certified.
  • 13 dB/mW higher sensitivity
    Brainwavz B400 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

    Brainwavz B400 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
  • 20,000 Hz higher treble extension
    Brainwavz B400 has a higher highest frequency than the average headphone (40,000 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

    Brainwavz B400 has a higher highest frequency than the average headphone (40,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.40000 Hz vs 20000 Hz
  • 8 Hz lower bass extension
    Brainwavz B400 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

    Brainwavz B400 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
  • In-line controls
    Brainwavz B400 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

    Brainwavz B400 includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
  • 12 dB SPL higher sound pressure level
    Brainwavz B400 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.
    What it is: Output loudness level of the headphones, usually measured in dB. It helps compare how loud a model can play under similar conditions.
    When it matters: When you need a rough idea of how loud the headphones can get before you pair them with a weaker source.

    Importance: LOW

    Good value: >=108 dB SPL

    Brainwavz B400 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.115 dB SPL vs 103 dB SPL
  • Hi-Res Audio certification
    Brainwavz B400 has Hi-Res Audio certification, the average headphone does not. 22.9% of headphones are Hi-Res Audio certified.
  • 13 dB/mW higher sensitivity
    Brainwavz B400 has a higher sensitivity than the average headphone (115 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
  • 20,000 Hz higher treble extension
    Brainwavz B400 has a higher highest frequency than the average headphone (40,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
  • 8 Hz lower bass extension
    Brainwavz B400 has a lower lowest frequency than the average headphone (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
  • 12 dB SPL higher sound pressure level
    Brainwavz B400 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.
  • In-line controls
    Brainwavz B400 includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.

Total
Sound
Calls & Controls
  • Tangle-prone cable
    Brainwavz B400 uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
  • No neodymium magnet
    Brainwavz B400 does not use neodymium magnets, the average headphone does. 77.4% of headphones use neodymium magnets.
  • 3 fewer drivers
    Brainwavz B400 has fewer drivers than the average headphone (4 vs 1). The average headphones use 1 drivers.
  • 46.3% lower user score
    Brainwavz B400 has a lower user score than the average headphone (5.47 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.
    Brainwavz B400 has a lower user score than the average headphone (5.47 vs 8.000).5.47 vs 8
  • Tangle-prone cable
    Brainwavz B400 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

    Brainwavz B400 uses a tangle-prone cable, while the average headphone is easier to manage. 64.2% of headphones use a tangle-free cable.
  • No neodymium magnet
    Brainwavz B400 does not use neodymium magnets, the average headphone does. 77.4% of headphones use neodymium magnets.
    What it is: Uses neodymium magnets for stronger, clearer sound
    When it matters: When driver construction details are part of how you compare sound hardware.

    Importance: LOW

    Brainwavz B400 does not use neodymium magnets, the average headphone does. 77.4% of headphones use neodymium magnets.
  • 3 fewer drivers
    Brainwavz B400 has fewer drivers than the average headphone (4 vs 1). The average headphones use 1 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

    Brainwavz B400 has fewer drivers than the average headphone (4 vs 1). The average headphones use 1 drivers.4 vs 1
  • 66.7% more expensive
    Brainwavz B400 is more expensive than the average headphone (£150 vs £90).
    Brainwavz B400 is more expensive than the average headphone (£150 vs £90).£150 vs £90
Total
Overall
Design
Sound

Graphic comparison of Brainwavz B400 and

Attribute category
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Third-party reviews

United Kingdom
amazon
3.3
35 Reviews
amazon
3.0
5 Reviews
United States
Amazon_logo.png
3.3
35 Reviews
Amazon_logo.png
3.0
5 Reviews

(Reviews last updated: June 2026)

What customers like about Brainwavz B400?

  • Excellent midrange performance with highly detailed and forward-sounding vocals.
  • Comfortable, lightweight ergonomic design resulting from 3D-printed resin shells.
  • Smooth, non-fatiguing sound signature suitable for long listening sessions.
  • Rich accessory package including a hard case, multiple silicone tips, and Comply foam tips.
  • Detachable MMCX cables for easy replacement and improved longevity.
  • Impressive holographic and natural soundstage with precise instrument placement.
  • High value for money compared to other quad-driver balanced armature earphones.

What customers dislike about Brainwavz B400?

  • Bass lacks visceral 'punch' or deep sub-bass rumble preferred by some listeners.
  • Reported durability issues, specifically regarding the fragile 3D-printed shells and driver failure.
  • Treble is slightly rolled off and may lack the 'sparkle' desired by some audiophiles.
  • Cables are prone to tangling and can be difficult to detach from the MMCX connectors.
  • Warm sound signature can occasionally make certain tracks sound 'thick' or 'stuffy'.
  • Minor aesthetic inconsistencies in the 3D-printed finish (e.g., uneven transparency).

Expert reviews

M
miniklangwunder.de
09/08/2018
RME Audio ADI-2 DAC review (performance testing with B400)", "Testing the RME Audio ADI-2 DAC (performance testing with B400)

The RME Audio ADI-2 DACGo review by Miniklangwunder highlights the device as an incredibly versatile, "Swiss Army knife" style desktop headphone amplifier and digital-to-analog converter. Highly praised for its exceptional build quality and a high-contrast matrix display, it functions exceptionally well with an array of headphones—ranging from high-impedance 300 Ohm Over-Ears to...Read more

(Translated)Show original
M
miniklangwunder.de
22/04/2019
ER2SE & XR Review – Etymotic Goes Dynamic (Includes Detailed B400 Comparison)

The Etymotic ER2SE (Studio Edition) and ER2XR (Extended Response) mark a significant departure for the manufacturer, utilizing single dynamic drivers instead of their traditional balanced armature technology. The reviewer notes that both in-ear monitors feature an identical, deeply-inserting cylindrical aluminum housing that offers exceptional noise isolation of up to 35 dB....Read more

(Translated)Show original
A
auriculares-hifi.com
08/10/2018
Brainwavz B400 - Hi-Fi Earphones", "Brainwavz B400 - Hi-Fi Headphones

The Brainwavz B400 is an ergonomic, 3D-printed in-ear monitor (IEM) priced around $200 that features four Balanced Armature (BA) drivers per side and uses detachable MMCX cables. On the positive side, it delivers a highly balanced, warm, and musical sound signature with quick, punchy bass driven by a dedicated dual-BA woofer. The mid-range is beautifully rendered, making...Read more

(Translated)Show original
A
afdigitale.it
14/12/2018
Brainwavz B400: when design triumphs over everything else

The Brainwavz B400 is an in-ear monitor designed with a quad-driver system—featuring one driver for lows, two for mids, and one for highs—and constructed using 3D-printing technology for a robust, ergonomic, single-piece design. Retailing at around €180, these wired earphones offer excellent practical features, including lightweight and comfortable over-ear hooks, five pairs of...Read more

(Translated)Show original
S
stereo-head.it
19/12/2018
Brainwavz B400 – The new budget multi-driver IEMs – Review

The Brainwavz B400 is an affordable, quad-driver In-Ear Monitor (IEM) priced around 179.95 euros that features 3D-printed plastic shells available in multiple semi-transparent colors. Despite packing four Knowles balanced armature drivers and a three-way crossover into a very compact chassis, these lightweight earphones offer excellent comfort and ergonomics with an over-the-ear...Read more

(Translated)Show original

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