OVERALL
ALTERNATIVES
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REVIEWS
Scored using Headphones Methodology v1.0
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Products in this category are scored under Frontum Headphones Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
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Boult Audio Flex Review | 93 Data compared

Avg. price:~£25Form factor:over-earConnectivity:wirelessBattery life:65 hoursActive noise cancellation (ANC):no

Boult Audio Flex Review: Compare 93 technical specifications and user reviews to see how this product ranks in the Headphones category and whether it is worth buying.

Boult Audio Flex
7.0/10

Overall score

Score
7.0/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 74% of models
Score components

80%

6.7

Technical score

20%

8.4

User score

â–²Better than 74% of headphones
7.9

Value for money

Value for money
7.9/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 75% of models
Score components

70%

7.0

Overall score

30%

10

Price

â–²Better than 75%
6.7

Technical score

Technical score
6.7/ 10
✕
What it is
An assessment of technical performance for products in the Headphones category across these key areas: Sound, Calls & Controls, Connectivity, Features, Battery, Design.
When it matters
When you want to compare headphones based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 72% of models
Score components

52%

6.2

Sound

20%

6.1

Features

10%

7.6

Design

8%

6.8

Connectivity

6%

9.5

Battery

4%

8.3

Calls & Controls

â–²Better than 72%
8.4

User score

User score
8.4/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 80% of models
Score components

70%

7.7

User ratings

30%

10

Number of reviews

Based on ratings from across the web.
â–²Better than 80%
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of pair of headphones Boult Audio Flex

Technical score
Technical score
6.7/ 10
✕
What it is
An assessment of technical performance for products in the Headphones category across these key areas: Sound, Calls & Controls, Connectivity, Features, Battery, Design.
When it matters
When you want to compare headphones based on technical performance and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 72% of models
Score components:

52%

6.2

Sound

20%

6.1

Features

10%

7.6

Design

8%

6.8

Connectivity

6%

9.5

Battery

4%

8.3

Calls & Controls

6.7
User score
User score
8.4/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 80% of models
Score components

70%

7.7

User ratings

30%

10

Number of reviews

Based on ratings from across the web.
8.4
Popularity
Popularity
10/ 10
✕
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.
Score distribution
â–¼
<55-66-77-88-99-10
★ Better than 92% of models
Popularity:
Boult Audio Flex has a popularity score of 10 points, which is higher than that of 91.9% of products in this category.
10
Value for money
Value for money
7.9/ 10
✕
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 distribution
â–¼
<55-66-77-88-99-10
â–² Better than 75% of models
Score components:

70%

7.0

Overall score

30%

10

Price

7.9
Active noise cancellation (ANC)
no
This pair of headphones does not support active noise cancellation. 27.5% of headphones support active noise cancellation.
Driver type
dynamic
Driver size
40 mm
Market range: <10 mm – >50 mm
This pair of headphones uses a driver size of 40 mm, larger driver size than 28.6% of headphones and equal to 53.3% of headphones.
Number of drivers
1
Market range: <1 – >4
This pair of headphones uses 1 drivers, fewer drivers than 4% of headphones and equal to 96% of headphones.
Lowest frequency
20 Hz
Market range: <5 Hz – >20 Hz
This pair of headphones reaches a lowest frequency of 20 Hz, higher lowest frequency than 50.8% of headphones and equal to 47.3% of headphones.
Show more
Noise-canceling microphone
yes
This pair of headphones supports a noise-canceling microphone. 61.1% of headphones support noise-canceling microphones.
Can be used as a headset
yes
This pair of headphones is headset-ready, 84.8% is not. 15.2% of headphones can be used as headsets.
Number of microphones
1
Market range: <0 – >4
This pair of headphones has 1 microphones, more microphones than 26.9% of headphones and equal to 50.9% of headphones.
Boom microphone
no
This pair of headphones does not include a boom microphone. 13.5% of headphones have a boom microphone.
Microphone SNR
?
Show more
Connectivity
wireless
This pair of headphones supports wireless connectivity, more flexible connectivity than 50.8% of headphones and equal to 49.2% of headphones.
Bluetooth version
5.4
This pair of headphones uses Bluetooth version 5.4, newer Bluetooth version than 95.2% of headphones and equal to 4.1% of headphones.
Maximum Bluetooth range
10 m
Market range: <10 m – >15 m
This pair of headphones offers a Bluetooth range of 10 m, higher Bluetooth range than 2.7% of headphones and equal to 80.6% of headphones.
Audio latency
60 ms
Market range: <40 ms – >222 ms
This pair of headphones has audio latency of 60 ms, lower audio latency than 65.5% of headphones and equal to 6.2% of headphones.
Multipoint support
yes
This pair of headphones supports multipoint. 69.4% of headphones support multipoint.
Show more
Ambient sound mode
yes
This pair of headphones supports ambient sound mode. 75.2% of headphones support ambient sound mode.
EQ support
?
Companion app
no
This pair of headphones does not work with a companion app. 21.6% of headphones support companion apps.
Adjustable ANC levels
N/A
Voice assistant support
yes
This pair of headphones supports voice assistants. 39.2% of headphones support voice assistants.
Show more
Battery life
65 hours
Market range: <10 hours – >70 hours
This pair of headphones offers battery life of 65 hours, higher battery life than 85.5% of headphones and equal to 1.8% of headphones.
Battery life with ANC
N/A
Charging time
1 hour
Market range: <1.5 hours – >3.5 hours
This pair of headphones needs 1 hour to charge, lower charging time than 96.1% of headphones and equal to 3.3% of headphones.
Quick charge
yes
This pair of headphones supports quick charge. 67% of headphones support quick charge.
Battery capacity
750 mAh
Market range: <290 mAh – >1k mAh
This pair of headphones has a battery capacity of 750 mAh, higher battery capacity than 71.9% of headphones and equal to 2.6% of headphones.
Show more
Brand name
Boult
Form factor
over-ear
Weight
214 g
Market range: <14 g – >340 g
This pair of headphones weighs 214 g, lighter than 51.4% of headphones and equal to 0.2% of headphones.
Acoustic design
closed-back
Clamp force
?
Show more

Boult Audio Flex vs the average pair of headphones

246810TotalDesignSoundBatteryConnectivityCalls & ControlsFeatures
  • Ambient sound mode
    This pair of headphones supports ambient sound mode, the average pair of headphones does not. 24.9% of headphones support ambient sound mode.
  • 16 dB/mW higher sensitivity
    This pair of headphones has a higher sensitivity than the average pair of headphones (118 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    118 dB/mW vs 102 dB/mW
  • Multipoint support
    This pair of headphones supports multipoint, the average pair of headphones does not. 30.6% of headphones support multipoint.
  • 35 hours longer battery life
    This pair of headphones has a higher battery life than the average pair of headphones (65 hours vs 30 hours). The average headphones offer battery life of 30 hours.
    65 hours vs 30 hours
  • More flexible connectivity
    This pair of headphones offers more flexible connectivity than the average pair of headphones (wireless vs wired). The average headphones support wired connectivity.
    wireless vs wired
  • Clear call microphone
    This pair of headphones offers a clear call microphone, while the average pair of headphones does not. 39% of headphones support noise-canceling microphones.
  • 1 hours shorter charging time
    This pair of headphones has a lower charging time than the average pair of headphones (1 hours vs 2 hours). The average headphones need 2 hours to charge.
    1 hours vs 2 hours
  • Quick charge support
    This pair of headphones supports quick charge, the average pair of headphones does not. 33% of headphones support quick charge.
  • 3.6x cheaper
    Boult Audio Flex is cheaper than the average pair of headphones (£25 vs £90).
    £25 vs £90
  • 70.4% more popular
    Boult Audio Flex is more popular than the average pair of headphones (10 vs 5.9).
    10 vs 5.87
  • Foldable design
    This pair of headphones has a foldable design, the average pair of headphones does not. 48.3% of headphones are foldable.
  • Water resistance
    This pair of headphones is water resistant, the average pair of headphones is not. 20.2% of headphones are water resistant.
  • Better IP rating
    This pair of headphones has a better IP rating than the average pair of headphones (IPX5 vs none). The average headphones have an IP rating of none.
    IPX5 vs none
  • 16 dB/mW higher sensitivity
    This pair of headphones has a higher sensitivity than the average pair of headphones (118 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    118 dB/mW vs 102 dB/mW
  • 15 dB SPL higher sound pressure level
    This pair of headphones has a higher sound pressure level than the average pair of headphones (118 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.
    118 dB SPL vs 103 dB SPL
  • 35 hours longer battery life
    This pair of headphones has a higher battery life than the average pair of headphones (65 hours vs 30 hours). The average headphones offer battery life of 30 hours.
    65 hours vs 30 hours
  • 1 hours shorter charging time
    This pair of headphones has a lower charging time than the average pair of headphones (1 hours vs 2 hours). The average headphones need 2 hours to charge.
    1 hours vs 2 hours
  • Quick charge support
    This pair of headphones supports quick charge, the average pair of headphones does not. 33% of headphones support quick charge.
  • USB-C charging
    This pair of headphones uses USB-C charging, the average pair of headphones does not. 29.5% of headphones use USB Type-C.
  • 29.3% higher battery capacity
    This pair of headphones has a higher battery capacity than the average pair of headphones (750 mAh vs 580 mAh). The average headphones have a battery capacity of 580 mAh.
    750 mAh vs 580 mAh
  • Rechargeable battery
    This pair of headphones has a rechargeable battery, the average pair of headphones does not. 47.9% of headphones have a rechargeable battery.
  • Multipoint support
    This pair of headphones supports multipoint, the average pair of headphones does not. 30.6% of headphones support multipoint.
  • More flexible connectivity
    This pair of headphones offers more flexible connectivity than the average pair of headphones (wireless vs wired). The average headphones support wired connectivity.
    wireless vs wired
  • 90 ms lower audio latency
    This pair of headphones has a lower audio latency than the average pair of headphones (60 ms vs 150 ms). The average headphones have audio latency of 150 ms.
    60 ms vs 150 ms
  • Fast pairing support
    This pair of headphones supports fast pairing, the average pair of headphones does not. 14% of headphones support fast pairing.
  • Low-latency game mode
    This pair of headphones includes a low-latency game mode, the average pair of headphones does not. 21.2% of headphones support low-latency game mode.
  • Clear call microphone
    This pair of headphones offers a clear call microphone, while the average pair of headphones does not. 39% of headphones support noise-canceling microphones.
  • On-device controls
    This pair of headphones includes on-device controls, the average pair of headphones does not. 46.8% of headphones support on-device controls.
  • Wind noise reduction
    This pair of headphones reduces wind noise, the average pair of headphones does not. 34.3% of headphones support wind noise reduction.
  • Ambient sound mode
    This pair of headphones supports ambient sound mode, the average pair of headphones does not. 24.9% of headphones support ambient sound mode.
  • 2 Hz weaker bass extension
    This pair of headphones has a higher lowest frequency than the average pair of headphones (20 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    20 Hz vs 18 Hz
  • No travel bag
    This pair of headphones does not include a travel bag, the average pair of headphones does. 65.4% of headphones include a travel bag.
  • No travel bag
    This pair of headphones does not include a travel bag, the average pair of headphones does. 65.4% of headphones include a travel bag.
  • 2 Hz weaker bass extension
    This pair of headphones has a higher lowest frequency than the average pair of headphones (20 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    20 Hz vs 18 Hz

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

9.0
Tech Singh
≈ estimated
26/02/2019
Unboxing and review · two weeks of daily use
Verdict
Boult Audio Flex is a budget pair with strong bass and good sound, worth recommending despite the plastic build and weak call mic.
9.0
Technical ONEBOX
≈ estimated
07/01/2025
Long-term review · 30 days of use
Verdict
Boult Audio Flex is the best option at this price, with comfort, clear sound and long battery life.
8.0
Infinite Suprem
≈ estimated
20/05/2025
First look · unboxing and first connection
Verdict
Boult Audio Flex has made a good first impression so far, with a longer test planned before a full verdict.
Overview video
Not graded
Hands-on video, no verdict
Not graded

Expert reviews

In-depth analysis and verdict from leading tech publications

geekman.in
30/01/2019
Hands-on review · Sports Bluetooth headphones
Verdict
The Boult Audio Flex is a comfortable, sweat-resistant pair for workouts and movies, but its deep bass can go missing on some tracks.
topbestof.com
18/08/2026
Hands-on review · Bluetooth headphones
Verdict
The Boult Audio ProBass Flex is a sturdy, sweat-resistant pair with punchy bass and a 10-hour battery, though the earcups press hard on long wear.

Third-party reviews

Based on ratings from across the web.
Reviews last updated: November 2026 · How we calculate this

What customers like about Boult Audio Flex

  • Impressive battery life, with some models offering up to 80 hours of playtime
  • Deep, thumping bass that appeals to bass enthusiasts
  • Affordable price point, often cited as high value for money in the budget segment
  • Comfortable memory foam ear cushions suitable for extended wear
  • Lightweight and foldable design, making them portable and travel-friendly
  • Dual-mode functionality allows for both wireless Bluetooth and wired AUX use

What customers don't like about Boult Audio Flex

  • Frequent Bluetooth connectivity issues, including repeated auto-disconnections
  • Mixed build quality with reports of the headband or joints breaking after short-term use
  • Passive noise cancellation is often described as ineffective or non-existent
  • Microphone performance can be unreliable, particularly during calls or when using AUX mode
  • Average sound clarity; high volumes may lead to some audio distortion
  • Customer service and after-sales support have received significant negative feedback

Verdict

The Boult Audio Flex is an over-ear wireless headphone featuring 40mm bass drivers, Bluetooth 5.4 connectivity, and a versatile 'Dual Mode' that allows for both wireless and 3.5mm AUX wired listening. It is equipped with Zenâ„¢ ENC microphone technology for clearer calls, 4 customizable EQ modes (Bass, Rock, Pop, Vocal), and an IPX5 water resistance rating, while offering an impressive battery life of up to 80 hours with Type-C fast charging. Key pros include its exceptional playtime, lightweight 205g foldable design for portability, and ultra-low 60ms latency for gaming; however, some users have noted cons such as potentially tight clamping force that may cause discomfort during extended wear and a lack of active noise cancellation (ANC), relying instead on passive isolation.

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