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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The Earfun Air Pro 2 are true wireless earbuds offering convenience, with a closed-back design that helps isolate noise, making them suitable for commuting or use in noisy environments. They also support active noise cancelling and have features optimized for calls, water resistance, and a built-in microphone, which the Koss KSC75 lack. On the other hand, the Koss KSC75 headphones have an open-back design which typically provides a wider soundstage for a more immersive music experience, but they don't isolate sound well, making them less ideal in noisy settings. The KSC75 are wired, which means no concerns about battery life, but less freedom of movement compared to the wireless Earfun Air Pro 2. They lack a microphone and active noise cancelling. Your preference for wireless convenience and extra features against better sound quality and price will guide your choice. If budget is a key factor and you do not need wireless features or a microphone, the Koss KSC75 would be the more economical option. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Earfun Air Pro 2
- Very good for air travel
Advantages of the Koss KSC75
- Very good for music
- Good for TV and video
- Good for podcasts and audiobooks
Key differences
Music
6.4
8.3
The Koss KSC75 is very good for music, while the Earfun Air Pro 2 is only fair.
Gaming
5.1
6.4
The Koss KSC75 is only fair for gaming, while the Earfun Air Pro 2 is poor.
Phone Calls
6.1
4.8
The Earfun Air Pro 2 is only fair for phone calls, while the Koss KSC75 is poor.
Podcasts and Audiobooks
6.9
7.5
The Koss KSC75 is good for podcasts and audiobooks, while the Earfun Air Pro 2 is only fair.
TV and Video
5.4
7.7
The Koss KSC75 is good for TV and video, while the Earfun Air Pro 2 is poor.
Noise Reduction
8.3
2.5
The Earfun Air Pro 2 is very good for noise reduction, while the Koss KSC75 is poor.
Battery
6.0 Hours
N/A
The Earfun Air Pro 2 has 6 hours of battery life. The Koss KSC75 does not have a battery.
Cost
$70
$20
$0
$20
$40
$60
$80
$100
The Earfun Air Pro 2 has a price of $70 and the Koss KSC75 costs $20.
Build Quality
8.5
5.6
The Earfun Air Pro 2 has very good build quality, while the Koss KSC75 has poor build quality.
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How the Earfun Air Pro 2 and the Koss KSC75 compare to other earbuds and headphones
Spec Comparison
 |  | |
| Earfun Air Pro 2 | Koss KSC75 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$70 | $20 | ||
Brand | |||
Brand | Earfun | Koss | |
Release Date | |||
Release Date | August 1, 2021 | January 1, 2005 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 6.4/10 | 8.3/10 | |
Phone Calls Score | |||
Phone Calls Score | 6.1/10 | 4.9/10 | |
Gaming Score | |||
Gaming Score | 5.2/10 | 6.5/10 | |
TV and Video Score | |||
TV and Video Score | 5.5/10 | 7.7/10 | |
Exercise Score | |||
Exercise Score | 6.6/10 | 4.3/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 6 Hours | N/A | |
Wireless charging | |||
Wireless charging | Yes | N/A | |
Charging time | |||
Charging time | 1.1 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5.2 | N/A | |
Case Battery Life | |||
Case Battery Life | 24 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 8.4/10 | 2.5/10 | |
Virtual Surround | |||
Virtual Surround | No | N/A | |
Android App | |||
Android App | No | N/A | |
iOS App | |||
iOS App | No | N/A | |
Mic Quality | |||
Mic Quality | 6.5/10 | N/A | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 5.7/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7/10 | |
Size | |||
Size | Small | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 5.5 Grams | 45.3 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Shopping
Earfun Air Pro 2
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Dig into reviews and images
Headphone Addict
Peter Susic | September 2021
"There’s a lot to like about EarFun Air Pro 2. The best thing about them is the active noise cancellation, which works almost as well as the best true wireless earbuds out there. The audio quality is funky but enjoyable. Good dynamics and a wider soundstage save its presentation. Everyone, apart from the most diehard audiophiles, should be happy with it."
Koss KSC75
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Dig into reviews and images
InEar Fidelity
Crinacle | June 2022
"Let’s not insult the KSC75 by saying that it’s simply good for the price… because it’s far more than that. It basically has a monopoly at its asking price, and could still give modern budget headphones a run for their money 15 years after its release. The KSC75 is the world’s best not-headphone."
Get a great deal on the Earfun Air Pro 2 or the Koss KSC75
About Earfun
Earfun is an audio equipment manufacturer, headquartered in California, that specializes in producing quality, very affordable earbuds and wireless speakers. According to their site, their mission is to provide high-quality sound that the general public can hear, perceive, and afford.
About Koss
Koss is an American headphone manufacturer established in 1953. In 1958, they created the first set of stereophones, that is headphones with stereo sound, and in 1984 they released the world-famous Porta Pro, a set of on-ear headphones that has remained essentially unchanged for more than 30 years and that is still made, sold and loved by many audio enthusiasts around the world today.
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This information was produced and vetted by the PerfectRec earbuds & headphones team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest earbuds or headphones information and makes it digestible for you.
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About the Earbuds or Headphones team
Joe Golden, Ph.D
CEO and Earbuds and Headphones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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Earbuds and Headphones Expert
Luis is a Mexico-based headphones expert. He’s been making headphone recommendations for five years and has close to 100 pairs in his personal collection.
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