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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
If you prioritize overall sound quality and durable build, the KZ ZSN Pro could be the better option, as it offers a higher sound quality and build quality. It also has a detachable cable which can be a significant advantage if the cable gets damaged or if you want to upgrade it later. However, the Sennheiser CX300S has better noise isolation which can be important if you are in noisy environments and need to block ambient noise. The Sennheisers are more portable with a smaller earbud size which might be a consideration if you carry your earbuds around frequently. While the KZ ZSN Pro is less expensive, the decision should be based on which features align most with your day-to-day use. 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 KZ ZSN Pro
- Good for music
Advantages of the Sennheiser CX300S
- Good for air travel
Key differences
Music
7.7
6.9
The KZ ZSN Pro is good for music, while the Sennheiser CX300S is only fair.
Noise Reduction
5.3
7.0
The Sennheiser CX300S is good for noise reduction, while the KZ ZSN Pro is poor.
Cost
$21
$50
$0
$10
$20
$30
$40
$50
The KZ ZSN Pro has a price of $21 and the Sennheiser CX300S costs $50.
Build Quality
9.0
8.0
The KZ ZSN Pro has excellent build quality, while the Sennheiser CX300S has very good build quality.
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Key similarities
Gaming
6.0
6.1
The Sennheiser CX300S and KZ ZSN Pro are both only fair for gaming.
Phone Calls
3.1
3.0
The KZ ZSN Pro and Sennheiser CX300S are both poor for phone calls.
Podcasts and Audiobooks
4.9
4.7
The KZ ZSN Pro and Sennheiser CX300S are both poor for podcasts and audiobooks.
TV and Video
7.4
7.3
The KZ ZSN Pro and Sennheiser CX300S are both good for TV and video.
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How the KZ ZSN Pro and the Sennheiser CX300S compare to other earbuds and headphones
Spec Comparison
 |  | |
| KZ ZSN Pro | Sennheiser CX300S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$21 | $50 | ||
Brand | |||
Brand | KZ | Sennheiser | |
Release Date | |||
Release Date | March 1, 2019 | February 1, 2019 | |
Form Factor | |||
Form Factor | Earbuds | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.8/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 3.2/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 6/10 | 6.1/10 | |
TV and Video Score | |||
TV and Video Score | 7.5/10 | 7.4/10 | |
Exercise Score | |||
Exercise Score | 4.3/10 | 4.2/10 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | No | |
Noise Reduction Score | |||
Noise Reduction Score | 5.3/10 | 7/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 9/10 | 8/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7.6/10 | |
Size | |||
Size | Large | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 7 Grams | 12 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
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."
Sennheiser CX300S
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Dig into reviews and images
Major HiFi
Carroll Moore | April 2019
"Sennheiser offers impressive bang for your buck when it comes to the CX 300S. Built like a tank and sounding surprisingly good for such a budget-minded earphone, the CX 300S out-classes many of its would-be competitors. Functional but beautiful, it’s the perfect in-ear listening solution for anyone who wants to hear everything and look good doing it."
Get a great deal on the KZ ZSN Pro or the Sennheiser CX300S
About Sennheiser
A family-owned company, Sennheiser is a German, high fidelity, audio equipment manufacturer founded in 1945. Their consumer audio division is now owned by the Swiss hearing aid and cochlear implant manufacturer Sonova. Sennheiser offers a wide variety of, very high quality, audio equipment solutions, from headphones to earbuds, full sets of monitoring speakers, amplifiers and microphones. They also make what is widely regarded as the best, and most expensive, headphones in existence, the HE-1 Orpheus, costing a whopping $59,000 dollars.
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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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Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
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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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