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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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Koss PRO4aat Review | 93 Data compared

Avg. price:~£130Form factor:over-earConnectivity:wiredBattery life:N/A hoursActive noise cancellation (ANC):no

Koss PRO4aat Review: Compare 93 technical specifications and user reviews to see how this product ranks in the Headphones category and whether it is worth buying.

Koss PRO4aat
5.4/10

Overall score

Score
5.4/ 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–¼ Worse than 90% of models
Score components

80%

5.4

Technical score

20%

?

User score

â–¼Worse than 90% of headphones
6.7

Value for money

Value for money
6.7/ 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–¼ Worse than 87% of models
Score components

70%

5.4

Overall score

30%

9.8

Price

â–¼Worse than 87%
5.4

Technical score

Technical score
5.4/ 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
â–¼ Worse than 80% of models
Score components

52%

6.4

Sound

20%

4.0

Features

10%

4.8

Design

8%

4.6

Connectivity

6%

4.0

Battery

4%

4.9

Calls & Controls

â–¼Worse than 80%
?

User score

User score
8.0/ 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 58% of models
Score components

70%

?

User ratings

30%

?

Number of reviews

  • koss-pro4aat
  • koss-pro4aat
  • koss-pro4aat
koss-pro4aat
koss-pro4aat
koss-pro4aat
Where to buy
    N/A~ £130
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 Koss PRO4aat

Technical score
Technical score
5.4/ 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
â–¼ Worse than 80% of models
Score components:

52%

6.4

Sound

20%

4.0

Features

10%

4.8

Design

8%

4.6

Connectivity

6%

4.0

Battery

4%

4.9

Calls & Controls

5.4
User score
User score
8.0/ 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 58% of models
Score components

70%

?

User ratings

30%

?

Number of reviews

?
Popularity
Popularity
1.0/ 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 99% of models
Popularity:
Koss PRO4aat has a popularity score of 1 point, which is lower than that of 73.4% of products in this category.
1.0
Value for money
Value for money
6.7/ 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–¼ Worse than 87% of models
Score components:

70%

5.4

Overall score

30%

9.8

Price

6.7
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
50 mm
Market range: <10 mm – >50 mm
This pair of headphones uses a driver size of 50 mm, larger driver size than 86.3% of headphones and equal to 8.2% 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
10 Hz
Market range: <5 Hz – >20 Hz
This pair of headphones reaches a lowest frequency of 10 Hz, lower lowest frequency than 67.2% of headphones and equal to 12.6% of headphones.
Show more
Noise-canceling microphone
no
This pair of headphones does not support a noise-canceling microphone. 39% 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
0
Market range: <0 – >4
This pair of headphones has 0 microphones, fewer microphones than 73.2% of headphones and equal to 26.9% 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
N/A
Show more
Connectivity
wired
This pair of headphones supports wired connectivity, less flexible connectivity than 49.2% of headphones and equal to 50.8% of headphones.
Bluetooth version
N/A
Maximum Bluetooth range
N/A
Audio latency
N/A
Multipoint support
no
This pair of headphones does not support multipoint. 30.6% of headphones support multipoint.
Show more
Ambient sound mode
no
This pair of headphones does not offer ambient sound mode. 24.9% of headphones support ambient sound mode.
EQ support
no
This pair of headphones does not support EQ customization. 23.2% of headphones support EQ.
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
no
This pair of headphones does not support voice assistants. 60.9% of headphones support voice assistants.
Show more
Battery life
N/A
Battery life with ANC
N/A
Charging time
N/A
Quick charge
no
This pair of headphones does not support quick charging. 33.1% of headphones support quick charge.
Battery capacity
N/A
Show more
Brand name
Koss
Form factor
over-ear
Weight
595 g
Market range: <14 g – >340 g
This pair of headphones weighs 595 g, heavier than 99.4% of headphones and equal to 0.1% of headphones.
Acoustic design
closed-back
Clamp force
?
Show more

Koss PRO4aat vs the average pair of headphones

246810TotalDesignSoundBatteryConnectivityCalls & ControlsFeatures
  • 10 mm larger driver size
    This pair of headphones uses a larger driver size than the average pair of headphones (50 mm vs 40 mm). The average headphones use a driver size of 40 mm.
    50 mm vs 40 mm
  • 8 Hz lower bass extension
    This pair of headphones has a lower lowest frequency than the average pair of headphones (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    10 Hz vs 18 Hz
  • Direct 3.5 mm plug
    This pair of headphones includes a direct 3.5 mm plug, the average pair of headphones does not. 39.8% of headphones have a 3.5 mm male connector.
  • 0.2 % lower distortion
    This pair of headphones has a lower total harmonic distortion than the average pair of headphones (0.1 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.
    0.1 % vs 0.3 %
  • 5,000 Hz higher treble extension
    This pair of headphones has a higher highest frequency than the average pair of headphones (25,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
    25,000 Hz vs 20,000 Hz
  • 1.2 m longer cable length
    This pair of headphones offers a more useful cable length than the average pair of headphones (2.4 m vs 1.2 m). The average headphones have a cable length of 1.2 m.
    2.4 m vs 1.2 m
  • 1.2 m longer cable length
    This pair of headphones offers a more useful cable length than the average pair of headphones (2.4 m vs 1.2 m). The average headphones have a cable length of 1.2 m.
    2.4 m vs 1.2 m
  • 10 mm larger driver size
    This pair of headphones uses a larger driver size than the average pair of headphones (50 mm vs 40 mm). The average headphones use a driver size of 40 mm.
    50 mm vs 40 mm
  • 8 Hz lower bass extension
    This pair of headphones has a lower lowest frequency than the average pair of headphones (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    10 Hz vs 18 Hz
  • 0.2 % lower distortion
    This pair of headphones has a lower total harmonic distortion than the average pair of headphones (0.1 % vs 0.3 %). The average headphones have total harmonic distortion of 0.3 %.
    0.1 % vs 0.3 %
  • 5,000 Hz higher treble extension
    This pair of headphones has a higher highest frequency than the average pair of headphones (25,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
    25,000 Hz vs 20,000 Hz
  • Direct 3.5 mm plug
    This pair of headphones includes a direct 3.5 mm plug, the average pair of headphones does not. 39.8% of headphones have a 3.5 mm male connector.
  • 2.73x higher weight
    This pair of headphones is heavier than the average pair of headphones (595 g vs 218 g). The average pair of headphones weighs 218 g.
    595 g vs 218 g
  • No voice assistant support
    This pair of headphones does not support voice assistants, the average pair of headphones does. 60.8% of headphones support voice assistants.
  • Fixed cable
    This pair of headphones has a fixed cable, while the average pair of headphones has a detachable one. 62% of headphones have a detachable cable.
  • 7 dB/mW lower sensitivity
    This pair of headphones has a lower sensitivity than the average pair of headphones (95 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    95 dB/mW vs 102 dB/mW
  • No battery indicator
    This pair of headphones does not show battery level clearly, while the average pair of headphones does. 56.3% of headphones have a battery level indicator.
  • 1 fewer microphones
    This pair of headphones has fewer microphones than the average pair of headphones (0 vs 1). The average headphones have 1 microphones.
    0 vs 1
  • 5.87x less popular
    Koss PRO4aat is less popular than the average pair of headphones (1 vs 5.9).
    1 vs 5.87
  • 8% worse value for money
    Koss PRO4aat has worse value for money than the average pair of headphones (6.73 vs 7.3).
    6.73 vs 7.27
  • 5.87x less popular
    Koss PRO4aat is less popular than the average pair of headphones (1 vs 5.9).
    1 vs 5.87
  • 8% worse value for money
    Koss PRO4aat has worse value for money than the average pair of headphones (6.73 vs 7.3).
    6.73 vs 7.27
  • 2.73x higher weight
    This pair of headphones is heavier than the average pair of headphones (595 g vs 218 g). The average pair of headphones weighs 218 g.
    595 g vs 218 g
  • Fixed cable
    This pair of headphones has a fixed cable, while the average pair of headphones has a detachable one. 62% of headphones have a detachable cable.
  • 7 dB/mW lower sensitivity
    This pair of headphones has a lower sensitivity than the average pair of headphones (95 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    95 dB/mW vs 102 dB/mW
  • No neodymium magnet
    This pair of headphones does not use neodymium magnets, the average pair of headphones does. 81.9% of headphones use neodymium magnets.
  • 8 dB SPL lower sound pressure level
    This pair of headphones has a lower sound pressure level than the average pair of headphones (95 dB SPL vs 103 dB SPL). The average headphones reach a sound pressure level of 103 dB SPL.
    95 dB SPL vs 103 dB SPL
  • No battery indicator
    This pair of headphones does not show battery level clearly, while the average pair of headphones does. 56.3% of headphones have a battery level indicator.
  • 1 fewer microphones
    This pair of headphones has fewer microphones than the average pair of headphones (0 vs 1). The average headphones have 1 microphones.
    0 vs 1
  • No voice assistant support
    This pair of headphones does not support voice assistants, the average pair of headphones does. 60.8% of headphones support voice assistants.
  • 13 older release date
    This pair of headphones was released earlier than the average pair of headphones (2003 vs 2016). The average headphones were released in 2016.
    September 2003
    2003 vs 2016

Video reviews

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

9.0
pdgable
≈ estimated
21/05/2023
Hands-on review · pad swap and build tour
Verdict
Koss PRO4AAT is strongly recommended for sound and comfort, though its bass is recessed and needs EQ.
6.0
Mad Steex
≈ estimated
19/03/2022
Hands-on review · listening test across several genres
Verdict
Koss PRO4AAT's sound is not great overall, but it could suit mixing and monitoring in loud spaces.
9.0
pdgable
≈ estimated
21/05/2023
Comparison with Pro3AAT · sound, build and folding tests
Verdict
Koss PRO4AAT offers deep, flat sound and a solid build, but folding is limited and durability is a worry.
Overview video
Overview video

Third-party reviews

What customers like about Koss PRO4aat

  • Superior passive noise isolation that blocks out external environment effectively
  • Detailed and 'fast' sound signature with good control over decay
  • Sturdy and robust professional-grade build quality
  • Includes a high-quality carrying case and gold-plated adapters
  • Excellent for vocal monitoring and studio applications
  • Koss Limited Lifetime Warranty provides long-term peace of mind

What customers don't like about Koss PRO4aat

  • Extremely heavy and bulky design leading to neck strain
  • High clamping force and vinyl cushions can cause significant discomfort
  • Vinyl ear pads tend to cause sweating and heat buildup quickly
  • Sound can be perceived as thin, 'canned', or overly bright/metallic
  • High impedance requires a dedicated amplifier to sound its best
  • Requires a significant 'burn-in' period (up to 50+ hours) to open up the sound

Verdict

The Koss PRO4AAT is a pair of professional-grade, closed-back studio headphones featuring dynamic drivers with titanium-coated diaphragms that deliver a wide frequency response of 10–25,000 Hz. These over-ear headphones are built for durability with a robust steel and rubber headband, and they utilise oxygen-free copper voice coils to ensure precise audio reproduction with a sensitivity of 98 dB SPL. Key advantages include exceptional passive noise isolation due to their 'Pneumalite' ear cushions, a high 250-ohm impedance suitable for high-output studio equipment, and a 2.4-metre single-sided coiled cable for flexibility. However, their significant weight of approximately 425g–454g and high clamping force can lead to discomfort during long listening sessions, and their high impedance often requires a dedicated amplifier to achieve optimal volume and sound quality.

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