OVERALL
ALTERNATIVES
SPECS
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REVIEWS
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Fiil Key Max Review | 93 Data compared

Avg. price:~£70Form factor:over-earConnectivity:wirelessBattery life:80 hoursActive noise cancellation (ANC):yes

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

7.9

Overall score

Score
7.9/ 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 89% of models
Score components

80%

8.4

Technical score

20%

5.8

User score

â–²Better than 89% of headphones
8.4

Technical score

Technical score
8.4/ 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
★ Better than 96% of models
Score components

52%

8.8

Sound

20%

8.2

Features

10%

6.9

Design

8%

7.1

Connectivity

6%

9.6

Battery

4%

7.8

Calls & Controls

★Better than 96% of headphones
5.8

User score

User score
5.8/ 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–¼ Worse than 98% of models
Score components

70%

6.8

User ratings

30%

3.5

Number of reviews

Based on 20 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–¼Worse than 98% of headphones
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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 Fiil Key Max

Technical score
Technical score
8.4/ 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
★ Better than 96% of models
Score components:

52%

8.8

Sound

20%

8.2

Features

10%

6.9

Design

8%

7.1

Connectivity

6%

9.6

Battery

4%

7.8

Calls & Controls

8.4
User score
User score
5.8/ 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–¼ Worse than 98% of models
Score components

70%

6.8

User ratings

30%

3.5

Number of reviews

Based on 20 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
5.8
Popularity
Popularity
3.5/ 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
â–¼ Worse than 69% of models
Popularity:
Fiil Key Max has a popularity score of 3.5 points, which is lower than that of 68% of products in this category.
3.5
Value for money
Value for money
8.5/ 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
★ Better than 91% of models
Score components:

60%

7.9

Overall score

40%

10

Price

8.5
Active noise cancellation (ANC)
yes
Active noise cancellation (ANC)
yes
â–² Better than 73% of models
This pair of headphones supports active noise cancellation. 72.6% of headphones support active noise cancellation.
Driver type
dynamic
Driver size
40 mm
Driver size
40 mm
â–² Better than 29% of models
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
Number of drivers
1
â–¼ Worse than 4% of models
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
15 Hz
Lowest frequency
15 Hz
â–² Better than 58% of models
Market range: <5 Hz – >20 Hz
This pair of headphones reaches a lowest frequency of 15 Hz, lower lowest frequency than 58.3% of headphones and equal to 5.8% of headphones.
Show more
Noise-canceling microphone
yes
Noise-canceling microphone
yes
â–² Better than 61% of models
This pair of headphones supports a noise-canceling microphone. 61.1% of headphones support noise-canceling microphones.
Can be used as a headset
yes
Can be used as a headset
yes
â–² Better than 15% of models
This pair of headphones is headset-ready, 84.8% is not. 15.2% of headphones can be used as headsets.
Number of microphones
2
Number of microphones
2
â–² Better than 78% of models
Market range: <0 – >4
This pair of headphones has 2 microphones, more microphones than 77.9% of headphones and equal to 8.9% of headphones.
Boom microphone
no
Boom microphone
no
â–¼ Worse than 14% of models
This pair of headphones does not include a boom microphone. 13.5% of headphones have a boom microphone.
Microphone SNR
?
Show more
Connectivity
wireless
Connectivity
wireless
â–² Better than 51% of models
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
Bluetooth version
5.4
★ Better than 95% of models
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
?
Audio latency
100 ms
Audio latency
100 ms
â–² Better than 55% of models
Market range: <40 ms – >222 ms
This pair of headphones has audio latency of 100 ms, lower audio latency than 54.8% of headphones and equal to 1.7% of headphones.
Multipoint support
yes
Multipoint support
yes
â–² Better than 69% of models
This pair of headphones supports multipoint. 69.4% of headphones support multipoint.
Show more
Ambient sound mode
yes
Ambient sound mode
yes
â–² Better than 75% of models
This pair of headphones supports ambient sound mode. 75.2% of headphones support ambient sound mode.
EQ support
yes
EQ support
yes
â–² Better than 77% of models
This pair of headphones supports EQ customization. 76.8% of headphones support EQ.
Companion app
yes
Companion app
yes
â–² Better than 78% of models
This pair of headphones works with a companion app. 78.4% of headphones support companion apps.
Adjustable ANC levels
?
Voice assistant support
yes
Voice assistant support
yes
â–² Better than 39% of models
This pair of headphones supports voice assistants. 39.2% of headphones support voice assistants.
Show more
Battery life
80 hours
Battery life
80 hours
★ Better than 92% of models
Market range: <10 hours – >70 hours
This pair of headphones offers battery life of 80 hours, higher battery life than 92% of headphones and equal to 2.6% of headphones.
Battery life with ANC
80 hours
Battery life with ANC
80 hours
★ Better than 99% of models
Market range: <15 hours – >55 hours
This pair of headphones offers battery life with ANC of 80 hours, higher battery life with ANC than 98.7% of headphones and equal to 0.6% of headphones.
Charging time
1.75 hours
Charging time
1.75 hours
â–² Better than 87% of models
Market range: <1.5 hours – >3.5 hours
This pair of headphones needs 1.75 hours to charge, lower charging time than 86.9% of headphones and equal to 0.1% of headphones.
Quick charge
yes
Quick charge
yes
â–² Better than 67% of models
This pair of headphones supports quick charge. 67% of headphones support quick charge.
Battery capacity
?
Show more
Brand name
Fiil
Form factor
over-ear
Weight
250 g
Weight
250 g
â–¼ Worse than 61% of models
Market range: <14 g – >340 g
This pair of headphones weighs 250 g, heavier than 61.4% of headphones and equal to 1.5% of headphones.
Acoustic design
closed-back
Clamp force
5
Clamp force
5
â–¼ Worse than 68% of models
Market range: <2.5 – >6.1
This pair of headphones has a clamp force of 5, higher clamp force than 68.4% of headphones and equal to 2.1% of headphones.
Show more

Fiil Key Max vs the average pair of headphones

246810TotalDesignSoundBatteryConnectivityCalls & ControlsFeatures
  • Active noise cancellation
    Active noise cancellation (ANC)
    yes
    â–² Better than 73% of models
    This pair of headphones supports active noise cancellation, the average pair of headphones does not. 27.5% of headphones support active noise cancellation.
  • Hi-Res Audio certification
    Hi-Res Audio certification
    yes
    â–² Better than 77% of models
    This pair of headphones has Hi-Res Audio certification, the average pair of headphones does not. 23.1% of headphones are Hi-Res Audio certified.
  • Ambient sound mode
    Ambient sound mode
    yes
    â–² Better than 75% of models
    This pair of headphones supports ambient sound mode, the average pair of headphones does not. 24.9% of headphones support ambient sound mode.
  • EQ customization
    EQ support
    yes
    â–² Better than 77% of models
    This pair of headphones supports EQ customization, the average pair of headphones does not. 23.2% of headphones support EQ.
  • Companion app support
    Companion app
    yes
    â–² Better than 78% of models
    This pair of headphones works with a companion app, the average pair of headphones does not. 21.6% of headphones support companion apps.
  • 50 hours longer ANC battery life
    Battery life with ANC
    80 hours
    ★ Better than 99% of models
    Market range: <15 hours – >55 hours
    This pair of headphones has a higher battery life with ANC than the average pair of headphones (80 hours vs 30 hours). The average headphones offer battery life with ANC of 30 hours.
    80 hours vs 30 hours
  • 50 hours longer battery life
    Battery life
    80 hours
    ★ Better than 92% of models
    Market range: <10 hours – >70 hours
    This pair of headphones has a higher battery life than the average pair of headphones (80 hours vs 30 hours). The average headphones offer battery life of 30 hours.
    80 hours vs 30 hours
  • 13 dB/mW higher sensitivity
    Sensitivity
    115 dB/mW
    â–² Better than 89% of models
    Market range: <94 dB/mW – >115 dB/mW
    This pair of headphones has a higher sensitivity than the average pair of headphones (115 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    115 dB/mW vs 102 dB/mW
  • 16.9% better value for money
    Fiil Key Max has better value for money than the average pair of headphones (8.5 vs 7.3).
    8.5 vs 7.27
  • Foldable design
    Foldable
    yes
    â–² Better than 52% of models
    This pair of headphones has a foldable design, the average pair of headphones does not. 48.3% of headphones are foldable.
  • Water resistance
    Water resistance
    yes
    â–² Better than 80% of models
    This pair of headphones is water resistant, the average pair of headphones is not. 20.2% of headphones are water resistant.
  • Active noise cancellation
    Active noise cancellation (ANC)
    yes
    â–² Better than 73% of models
    This pair of headphones supports active noise cancellation, the average pair of headphones does not. 27.5% of headphones support active noise cancellation.
  • Hi-Res Audio certification
    Hi-Res Audio certification
    yes
    â–² Better than 77% of models
    This pair of headphones has Hi-Res Audio certification, the average pair of headphones does not. 23.1% of headphones are Hi-Res Audio certified.
  • 13 dB/mW higher sensitivity
    Sensitivity
    115 dB/mW
    â–² Better than 89% of models
    Market range: <94 dB/mW – >115 dB/mW
    This pair of headphones has a higher sensitivity than the average pair of headphones (115 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    115 dB/mW vs 102 dB/mW
  • 3 Hz lower bass extension
    Lowest frequency
    15 Hz
    â–² Better than 58% of models
    Market range: <5 Hz – >20 Hz
    This pair of headphones has a lower lowest frequency than the average pair of headphones (15 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    15 Hz vs 18 Hz
  • 12 dB SPL higher sound pressure level
    Sound pressure level
    115 dB SPL
    â–² Better than 88% of models
    Market range: <94 dB SPL – >115 dB SPL
    This pair of headphones has a higher sound pressure level than the average pair of headphones (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
  • 2,000 Hz higher treble extension
    Highest frequency
    22,000 Hz
    â–² Better than 52% of models
    Market range: <20k Hz – >40k Hz
    This pair of headphones has a higher highest frequency than the average pair of headphones (22000 Hz vs 20000 Hz). The average headphones reach a highest frequency of 20000 Hz.
    22,000 Hz vs 20,000 Hz
  • 50 hours longer ANC battery life
    Battery life with ANC
    80 hours
    ★ Better than 99% of models
    Market range: <15 hours – >55 hours
    This pair of headphones has a higher battery life with ANC than the average pair of headphones (80 hours vs 30 hours). The average headphones offer battery life with ANC of 30 hours.
    80 hours vs 30 hours
  • 50 hours longer battery life
    Battery life
    80 hours
    ★ Better than 92% of models
    Market range: <10 hours – >70 hours
    This pair of headphones has a higher battery life than the average pair of headphones (80 hours vs 30 hours). The average headphones offer battery life of 30 hours.
    80 hours vs 30 hours
  • Quick charge support
    Quick charge
    yes
    â–² Better than 67% of models
    This pair of headphones supports quick charge, the average pair of headphones does not. 33% of headphones support quick charge.
  • 0.25 hours shorter charging time
    Charging time
    1.75 hours
    â–² Better than 87% of models
    Market range: <1.5 hours – >3.5 hours
    This pair of headphones has a lower charging time than the average pair of headphones (1.8 hours vs 2 hours). The average headphones need 2 hours to charge.
    1.75 hours vs 2 hours
  • USB-C charging
    USB Type-C
    yes
    â–² Better than 71% of models
    This pair of headphones uses USB-C charging, the average pair of headphones does not. 29.5% of headphones use USB Type-C.
  • Rechargeable battery
    Has a rechargeable battery
    yes
    â–² Better than 52% of models
    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
    Multipoint support
    yes
    â–² Better than 69% of models
    This pair of headphones supports multipoint, the average pair of headphones does not. 30.6% of headphones support multipoint.
  • More flexible connectivity
    Connectivity
    wireless
    â–² Better than 51% of models
    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
  • LDAC support
    LDAC
    yes
    ★ Better than 92% of models
    This pair of headphones supports LDAC, the average pair of headphones does not. 8.1% of headphones support LDAC.
  • AAC codec support
    AAC
    yes
    â–² Better than 68% of models
    This pair of headphones supports AAC, the average pair of headphones does not. 32.2% of headphones support AAC.
  • 50 ms lower audio latency
    Audio latency
    100 ms
    â–² Better than 55% of models
    Market range: <40 ms – >222 ms
    This pair of headphones has a lower audio latency than the average pair of headphones (100 ms vs 150 ms). The average headphones have audio latency of 150 ms.
    100 ms vs 150 ms
  • Multipoint connections
    Multipoint connections
    yes
    â–² Better than 70% of models
    This pair of headphones supports multipoint connections, while the average pair of headphones does not. 30.2% of headphones support multipoint connections.
    supports multipoint for up to 2 devices.
  • Low-latency game mode
    Low-latency game mode
    yes
    â–² Better than 79% of models
    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
    Noise-canceling microphone
    yes
    â–² Better than 61% of models
    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 more microphones
    Number of microphones
    2
    â–² Better than 78% of models
    Market range: <0 – >4
    This pair of headphones has more microphones than the average pair of headphones (2 vs 1). The average headphones have 1 microphones.
    2 vs 1
  • Wind noise reduction
    Wind noise reduction
    yes
    â–² Better than 66% of models
    This pair of headphones reduces wind noise, the average pair of headphones does not. 34.3% of headphones support wind noise reduction.
  • Quick mic mute
    Mute function
    yes
    â–² Better than 71% of models
    This pair of headphones includes a quick mic mute, the average pair of headphones does not. 29.3% of headphones support a mute function.
  • Ambient sound mode
    Ambient sound mode
    yes
    â–² Better than 75% of models
    This pair of headphones supports ambient sound mode, the average pair of headphones does not. 24.9% of headphones support ambient sound mode.
  • EQ customization
    EQ support
    yes
    â–² Better than 77% of models
    This pair of headphones supports EQ customization, the average pair of headphones does not. 23.2% of headphones support EQ.
  • Companion app support
    Companion app
    yes
    â–² Better than 78% of models
    This pair of headphones works with a companion app, the average pair of headphones does not. 21.6% of headphones support companion apps.
  • 8 newer release date
    Release date
    2024
    â–² Better than 89% of models
    Market range: <2k – >2k
    This pair of headphones was released more recently than the average pair of headphones (2024 vs 2016). The average headphones were released in 2016.
    September 2024
    2024 vs 2016
  • 2.7 % higher distortion
    THD (Total Harmonic Distortion)
    3 %
    â–¼ Worse than 90% of models
    Market range: <0.08 % – >3 %
    This pair of headphones has a higher total harmonic distortion than the average pair of headphones (3 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.
    3 % vs 0.3 %
  • 14.7% higher weight
    Weight
    250 g
    â–¼ Worse than 61% of models
    Market range: <14 g – >340 g
    This pair of headphones is heavier than the average pair of headphones (250 g vs 218 g). The average pair of headphones weighs 218 g.
    250 g vs 218 g
  • 38% lower user score
    User score
    5.8/ 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
    â–¼
    <55-66-77-88-99-10
    Fiil Key Max
    the average pair of headphones
    Fiil Key Max has a lower user score than the average pair of headphones (5.80 vs 8.000).
    5.8 vs 8
  • 0.7 higher clamp force
    Clamp force
    5
    â–¼ Worse than 68% of models
    Market range: <2.5 – >6.1
    This pair of headphones has a higher clamp force than the average pair of headphones (5 vs 4.3). The average headphones have a clamp force of 4.3.
    5 vs 4.3
  • No travel bag
    Travel bag included
    no
    â–¼ Worse than 65% of models
    This pair of headphones does not include a travel bag, the average pair of headphones does. 65.4% of headphones include a travel bag.
  • 69.8% less popular
    Fiil Key Max is less popular than the average pair of headphones (3.46 vs 5.9).
    3.46 vs 5.87
  • 95% lower input power handling
    Max input power
    5 mW
    â–¼ Worse than 94% of models
    Market range: <10 mW – >1.6k mW
    This pair of headphones has a lower max input power than the average pair of headphones (5 mW vs 100 mW). The average headphones handle max input power of 100 mW.
    5 mW vs 100 mW
  • 38% lower user score
    User score
    5.8/ 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
    â–¼
    <55-66-77-88-99-10
    Fiil Key Max
    the average pair of headphones
    Fiil Key Max has a lower user score than the average pair of headphones (5.80 vs 8.000).
    5.8 vs 8
  • 69.8% less popular
    Fiil Key Max is less popular than the average pair of headphones (3.46 vs 5.9).
    3.46 vs 5.87
  • 14.7% higher weight
    Weight
    250 g
    â–¼ Worse than 61% of models
    Market range: <14 g – >340 g
    This pair of headphones is heavier than the average pair of headphones (250 g vs 218 g). The average pair of headphones weighs 218 g.
    250 g vs 218 g
  • No travel bag
    Travel bag included
    no
    â–¼ Worse than 65% of models
    This pair of headphones does not include a travel bag, the average pair of headphones does. 65.4% of headphones include a travel bag.
  • 0.7 higher clamp force
    Clamp force
    5
    â–¼ Worse than 68% of models
    Market range: <2.5 – >6.1
    This pair of headphones has a higher clamp force than the average pair of headphones (5 vs 4.3). The average headphones have a clamp force of 4.3.
    5 vs 4.3
  • 2.7 % higher distortion
    THD (Total Harmonic Distortion)
    3 %
    â–¼ Worse than 90% of models
    Market range: <0.08 % – >3 %
    This pair of headphones has a higher total harmonic distortion than the average pair of headphones (3 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.
    3 % vs 0.3 %
  • 95% lower input power handling
    Max input power
    5 mW
    â–¼ Worse than 94% of models
    Market range: <10 mW – >1.6k mW
    This pair of headphones has a lower max input power than the average pair of headphones (5 mW vs 100 mW). The average headphones handle max input power of 100 mW.
    5 mW vs 100 mW

Video reviews

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

Expert reviews

In-depth analysis and verdict from leading tech publications

T
techtest.org
18/06/2017
Summary of the review
FIIL Bluetooth headphones review: Excellent sounding noise-cancelling Bluetooth headphones from Asia
(Translated)Show original

Third-party reviews

Based on 20 buyer reviews from online shops.
Reviews last updated: June 2026 · How we calculate this
Read buyer reviews on Amazon →

What we like about Fiil Key Max

  • Exceptional battery life, cited at up to 80 hours total
  • Modern Bluetooth 5.4 support providing stable, low-latency connections
  • Support for high-res audio via the LDAC codec
  • Effective Adaptive Hybrid Active Noise Cancellation (ANC) for blocking low-frequency noise
  • Comfortable over-ear design suitable for long listening sessions
  • Deep, studio-grade sound with a wide frequency range (down to 15 Hz)

What we don't like about Fiil Key Max

  • Heavier than some competitors at approximately 384.8g
  • Lacks some advanced features found in rivals, such as NFC pairing
  • No official travel bag included in the standard package compared to similar models
  • ANC performance on higher frequency human chatter is less effective than specialized flagship models
  • Lower number of built-in microphones (2) compared to some premium competitors

Verdict

The FIIL Key Max is a high-performance over-ear wireless headset featuring 40mm extra-large dynamic drivers and advanced Bluetooth 5.4 for stable multipoint connectivity. It offers impressive technical specs, including a broad frequency response of 15Hz to 22kHz (reaching 40kHz in wired Type-C mode) and support for the high-resolution LDAC codec. Key highlights include adaptive hybrid active noise cancellation (ANC) capable of reducing ambient noise by up to 48dB and an exceptional battery life of up to 80 hours per charge. Its main pros are the massive playback time, dual-mic AI ENC for clear calls, and highly customizable sound through the fiil+ app. However, some users have noted a lack of on-ear wear detection and the absence of a dedicated travel bag as potential cons.

Compare Fiil Key Max with other products in the Headphones category

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