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What we think
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Updated January 10, 2024·
The Audio Technica ATH M30X headphones provide a fuller sound quality compared to the Sennheiser CX300S earbuds, making them suitable for immersive music listening. However, the CX300S offers better portability and comfort due to their small size and light weight, which could be advantageous if you're often on the go. Neither have built-in microphones, so if making calls is important, another product might be a better fit. Additionally, the M30X is less ideal for exercise due to its over-ear design and the earbuds score slightly higher in noise isolation, which can be preferable for listening in noisier environments. 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 Audio Technica ATH M30X
- Good for music
Advantages of the Sennheiser CX300S
- The Sennheiser CX300S has no clear advantages over the Audio Technica ATH M30X.
Key differences
Music
7.6
6.9
The Audio Technica ATH M30X is good for music, while the Sennheiser CX300S is only fair.
Gaming
6.6
6.1
The Audio Technica ATH M30X and Sennheiser CX300S are both only fair for gaming, though the Audio Technica ATH M30X is somewhat better.
Phone Calls
4.3
3.0
The Audio Technica ATH M30X and Sennheiser CX300S are both poor for phone calls, though the Audio Technica ATH M30X is somewhat better.
Podcasts and Audiobooks
6.9
4.7
The Audio Technica ATH M30X is only fair for podcasts and audiobooks, while the Sennheiser CX300S is poor.
TV and Video
7.9
7.3
The Audio Technica ATH M30X and Sennheiser CX300S are both good for TV and video, though the Audio Technica ATH M30X is somewhat better.
Noise Reduction
6.0
7.0
The Sennheiser CX300S is good for noise reduction, while the Audio Technica ATH M30X is only fair.
Cost
$89
$50
$0
$50
$100
$150
$200
The Audio Technica ATH M30X has a price of $89 and the Sennheiser CX300S costs $50.
Build Quality
7.2
8.0
The Sennheiser CX300S has very good build quality, while the Audio Technica ATH M30X has good build quality.
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How the Audio Technica ATH M30X and the Sennheiser CX300S compare to other earbuds and headphones
Spec Comparison
 |  | |
| Audio Technica ATH M30X | Sennheiser CX300S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$89 | $50 | ||
Brand | |||
Brand | Audio Technica | Sennheiser | |
Release Date | |||
Release Date | January 1, 2014 | February 1, 2019 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.7/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.4/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 6.6/10 | 6.1/10 | |
TV and Video Score | |||
TV and Video Score | 7.9/10 | 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 | 6/10 | 7/10 | |
Virtual Surround | |||
Virtual Surround | No | No | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 7.2/10 | 8/10 | |
Comfort score | |||
Comfort score | 7.4/10 | 7.6/10 | |
Size | |||
Size | N/A | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 220 Grams | 12 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
Audio Technica ATH M30X
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Dig into reviews and images
Soundguys
Jasper Lastoria | August 2023
"The Audio-Technica ATH-M30x is a great choice for anybody that needs a decent set of over-ear studio monitors. While the frequency response is not totally spot on, it works for basically every situation reasonably well. The sound quality and reasonably good comfort promote its candidacy as a great pick for $69 USD."
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 Audio Technica ATH M30X or the Sennheiser CX300S
About Audio Technica
Audio Technica is a 60-year-old, Japan-based, professional audio equipment manufacturer. They started off making phonograph cartridges and have expanded their scope of products ever since to include extremely popular models of microphones and headphones. They have been the official audio equipment supplier of several editions of the Summer and Winter Olympics and every edition of the Grammy Awards since 1998.
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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Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
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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