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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
If comfort and ease of use are your top priorities, the Koss KSC75 with its lightweight, clip-on design might be the better option. On the other hand, if you're looking for a more traditional in-ear option with the possibility of a better seal and passive noise isolation, the KZ ZSN Pro could suit you better. For those who prioritize sound quality and are fans of a more vibrant, detailed sound, the KZ ZSN Pro has a reputation for delivering an engaging listening experience. However, if you're more inclined towards a wider soundstage and a more open listening experience, the Koss KSC75 should be considered, even if it means a slightly less detailed sound compared to the KZ. Keep in mind, the KZ ZSN Pro may provide a more secure fit during activities due to its in-ear design, something to think about if you're on the move frequently. 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 Koss KSC75
- Very good for music
- Good for podcasts and audiobooks
Advantages of the KZ ZSN Pro
- The KZ ZSN Pro has no clear advantages over the Koss KSC75.
Key differences
Music
8.3
7.7
The Koss KSC75 is very good for music, while the KZ ZSN Pro is good.
Phone Calls
4.8
3.1
The Koss KSC75 and KZ ZSN Pro are both poor for phone calls, though the Koss KSC75 is somewhat better.
Podcasts and Audiobooks
7.5
4.9
The Koss KSC75 is good for podcasts and audiobooks, while the KZ ZSN Pro is poor.
Noise Reduction
2.5
5.3
The KZ ZSN Pro and Koss KSC75 are both poor for noise reduction, though the KZ ZSN Pro is somewhat better.
Cost
$20
$25
$0
$10
$20
$30
$40
$50
The Koss KSC75 has a price of $20 and the KZ ZSN Pro costs $25.
Build Quality
5.6
9.0
The KZ ZSN Pro has excellent build quality, while the Koss KSC75 has poor build quality.
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Key similarities
Gaming
6.4
6.0
The Koss KSC75 and KZ ZSN Pro are both only fair for gaming.
TV and Video
7.7
7.4
The Koss KSC75 and KZ ZSN Pro are both good for TV and video.
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How the Koss KSC75 and the KZ ZSN Pro compare to other earbuds and headphones
Spec Comparison
 |  | |
| Koss KSC75 | KZ ZSN Pro |
GENERAL | |||
|---|---|---|---|
| Price | |||
$20 | $25 | ||
Brand | |||
Brand | Koss | KZ | |
Release Date | |||
Release Date | January 1, 2005 | March 1, 2019 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.3/10 | 7.8/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.9/10 | 3.2/10 | |
Gaming Score | |||
Gaming Score | 6.5/10 | 6/10 | |
TV and Video Score | |||
TV and Video Score | 7.7/10 | 7.5/10 | |
Exercise Score | |||
Exercise Score | 4.3/10 | 4.3/10 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | No | |
Noise Reduction Score | |||
Noise Reduction Score | 2.5/10 | 5.3/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 5.7/10 | 9/10 | |
Comfort score | |||
Comfort score | 7/10 | 7.6/10 | |
Size | |||
Size | N/A | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 45.3 Grams | 7 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
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."
KZ ZSN Pro
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Dig into reviews and images
PrimeAudio
David Becker | 2019
"Undoubtedly the focus and the star of the show, the ZSN Pro’s bass is big, bold and bangin’. The amount of gusto in the low end should satisfy anyone who likes a large lick of bass and even certified bassheads will probably get a kick out of this."
Get a great deal on the Koss KSC75 or the KZ ZSN Pro
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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Why trust us
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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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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