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ALTERNATIVES
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REVIEWS
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Koss PRO3aa Review | 93 Data compared

Avg. price:~£60Form factor:over-earConnectivity:wiredBattery life:N/A hoursActive noise cancellation (ANC):no

Koss PRO3aa 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 PRO3aa
5.8/10

Overall score

Score
5.8/ 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 72% of models
Score components

80%

5.4

Technical score

20%

7.5

User score

â–¼Worse than 72% of headphones
7.1

Value for money

Value for money
7.1/ 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 67% of models
Score components

70%

5.8

Overall score

30%

10

Price

â–¼Worse than 67%
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 79% of models
Score components

52%

6.3

Sound

20%

4.0

Features

10%

5.2

Design

8%

4.6

Connectivity

6%

4.0

Battery

4%

5.0

Calls & Controls

â–¼Worse than 79%
7.5

User score

User score
7.5/ 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 73% of models
Score components

70%

8.4

User ratings

30%

5.5

Number of reviews

Based on ratings from across the web.
â–¼Worse than 73%
  • koss-pro3aa
koss-pro3aa
Where to buy
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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 Koss PRO3aa

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 79% of models
Score components:

52%

6.3

Sound

20%

4.0

Features

10%

5.2

Design

8%

4.6

Connectivity

6%

4.0

Battery

4%

5.0

Calls & Controls

5.4
User score
User score
7.5/ 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 73% of models
Score components

70%

8.4

User ratings

30%

5.5

Number of reviews

Based on ratings from across the web.
7.5
Popularity
Popularity
5.5/ 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 54% of models
Popularity:
Koss PRO3aa has a popularity score of 5.5 points, which is lower than that of 53.4% of products in this category.
5.5
Value for money
Value for money
7.1/ 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 67% of models
Score components:

70%

5.8

Overall score

30%

10

Price

7.1
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
15 Hz
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
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
yes
This pair of headphones includes a boom microphone. 86.5% 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
360 g
Market range: <14 g – >340 g
This pair of headphones weighs 360 g, heavier than 92.2% of headphones and equal to 0.4% of headphones.
Acoustic design
closed-back
Clamp force
?
Show more

Koss PRO3aa 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
  • 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 %
  • Foldable design
    This pair of headphones has a foldable design, the average pair of headphones does not. 48.3% of headphones are foldable.
  • 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
  • 3 Hz lower bass extension
    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
  • Boom microphone included
    This pair of headphones includes a boom microphone, the average pair of headphones does not. 13.5% of headphones have a boom microphone.
  • Foldable design
    This pair of headphones has a foldable design, the average pair of headphones does not. 48.3% of headphones are foldable.
  • 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
  • 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 %
  • 3 Hz lower bass extension
    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
  • 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.
  • Boom microphone included
    This pair of headphones includes a boom microphone, the average pair of headphones does not. 13.5% of headphones have a boom microphone.
  • 65.1% higher weight
    This pair of headphones is heavier than the average pair of headphones (360 g vs 218 g). The average pair of headphones weighs 218 g.
    360 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.
  • 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
  • 2 dB/mW lower sensitivity
    This pair of headphones has a lower sensitivity than the average pair of headphones (100 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    100 dB/mW vs 102 dB/mW
  • Tangle-prone cable
    This pair of headphones uses a tangle-prone cable, while the average pair of headphones is easier to manage. 64.2% of headphones use a tangle-free cable.
  • 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.
  • 6.3% lower user score
    User score
    7.5/ 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
    ▼▼
    <55-66-77-88-99-10
    Koss PRO3aa
    the average pair of headphones
    Koss PRO3aa has a lower user score than the average pair of headphones (7.53 vs 8).
    7.53 vs 8
  • 2.6% worse value for money
    Koss PRO3aa has worse value for money than the average pair of headphones (7.09 vs 7.3).
    7.09 vs 7.27
  • 65.1% higher weight
    This pair of headphones is heavier than the average pair of headphones (360 g vs 218 g). The average pair of headphones weighs 218 g.
    360 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.
  • Tangle-prone cable
    This pair of headphones uses a tangle-prone cable, while the average pair of headphones is easier to manage. 64.2% of headphones use a tangle-free cable.
  • 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 dB/mW lower sensitivity
    This pair of headphones has a lower sensitivity than the average pair of headphones (100 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    100 dB/mW vs 102 dB/mW
  • 10 dB lower max SPL
    This pair of headphones has a lower max SPL than the average pair of headphones (100 dB vs 110 dB). The average headphones reach a max SPL of 110 dB.
    100 dB vs 110 dB
  • 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.
    August 2003
    2003 vs 2016

Video reviews

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

Not graded

Expert reviews

In-depth analysis and verdict from leading tech publications

cnet.com
20/08/2003
Hands-on review · Folding closed-back headphones
Verdict
The Koss Pro3AA Titanium is a well-priced, comfortable pair with detailed highs and punchy bass, though its sound can be a bit bright.
connect.de
12/03/2008
Test review · Closed-back studio headphones
Verdict
The Koss Pro3AA Titanium sounds rich and full, but hissing highs and limited dynamics hold it back.
lesnumeriques.com
28/05/2013
Lab test · Closed-back headphones
Verdict
The Koss Pro3AA Titanium offers very good sound, but its neutral tuning suits home studio work better than versatile everyday listening.

Third-party reviews

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

What customers like about Koss PRO3aa

  • Exceptional sound quality for the price, described as having excellent high-frequency detail and taut, powerful bass
  • High level of comfort even for users with large heads or ears, suitable for long listening sessions
  • Excellent value for money, often found at a lower price point than similar competitors
  • Closed-ear design provides effective passive noise isolation
  • Collapsible/foldable design makes them convenient for compact storage and transport
  • Backed by the Use code with caution.Copied to clipboardjsonKoss Limited Lifetime WarrantyUse code with caution.Copied to clipboardjson, which covers defects for the life of the product

What customers don't like about Koss PRO3aa

  • Build quality issues, specifically fragile hinges and headbands that are prone to snapping even with normal use
  • Sound can be overly bright or sharp at times, particularly in the treble region
  • Requires a 'burn-in' period of 15 to 24 hours for the bass to fully develop and sound balanced
  • Non-detachable 8-foot cable can be cumbersome and is not easily replaceable if it fails
  • The stock leatherette ear pads may become warm or 'sweaty' during extended use
  • Warranty repairs, while free for the service itself, require the user to pay for shipping costs

Verdict

The Koss PRO3AA is a professional closed-back headphone featuring titanium-coated high polymer diaphragms designed for accurate sound reproduction across a wide 15–20,000 Hz frequency response. These headphones provide a balanced audio profile with punchy low-end, rich mids, and a 60-ohm impedance that remains manageable for most sources, while offering high isolation through a passive noise-reduction seal. Key pros include excellent high-frequency detail, a collapsible design for portability, and a long 8-foot single-entry cord accompanied by a screw-on 6.3mm adapter. However, some users find the treble slightly too bright and have reported concerns regarding the long-term durability of the plastic hinges and headband assembly.

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