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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
If you're looking for durability and studio-quality sound, the Audio Technica M50x may justify the higher cost with its over-ear design offering better sound isolation and bass response. They are also better suited for mixing and monitoring in a studio setting. On the other hand, if you're after a more portable and affordable option for casual listening, the Sennheiser CX300S will serve you well, offering decent sound quality and noise isolation for in-ear earbuds. Keep in mind that the in-ear design of the CX300S might be more comfortable for extended wear and convenient for on-the-go use compared to the bulkier over-ear M50x. 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 M50x
- Very good for music
- Good for podcasts and audiobooks
Advantages of the Sennheiser CX300S
- The Sennheiser CX300S has no clear advantages over the Audio Technica M50x.
Key differences
Music
8.5
6.9
The Audio Technica M50x is very good for music, while the Sennheiser CX300S is only fair.
Phone Calls
4.4
3.0
The Audio Technica M50x and Sennheiser CX300S are both poor for phone calls, though the Audio Technica M50x is somewhat better.
Podcasts and Audiobooks
7.0
4.7
The Audio Technica M50x is good for podcasts and audiobooks, while the Sennheiser CX300S is poor.
Noise Reduction
5.3
7.0
The Sennheiser CX300S is good for noise reduction, while the Audio Technica M50x is poor.
Cost
$149
$50
$0
$50
$100
$150
$200
The Audio Technica M50x has a price of $149 and the Sennheiser CX300S costs $50.
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Key similarities
Gaming
6.3
6.1
The Audio Technica M50x and Sennheiser CX300S are both only fair for gaming.
TV and Video
7.8
7.3
The Audio Technica M50x and Sennheiser CX300S are both good for TV and video.
Build Quality
8.5
8.0
The Audio Technica M50x and Sennheiser CX300S both have very good build quality.
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How the Audio Technica M50x and the Sennheiser CX300S compare to other earbuds and headphones
Spec Comparison
 |  | |
| Audio Technica M50x | Sennheiser CX300S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$149 | $50 | ||
Brand | |||
Brand | Audio Technica | Sennheiser | |
Release Date | |||
Release Date | January 1, 2007 | February 1, 2019 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.5/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.4/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 6.3/10 | 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 | 5.3/10 | 7/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8/10 | |
Comfort score | |||
Comfort score | 7.3/10 | 7.6/10 | |
Size | |||
Size | N/A | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 294.8 Grams | 12 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
Audio Technica M50x
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Dig into reviews and images
Sound Guys
Jasper Lastoria | October 2022
"Good sound is timeless. It doesn’t matter that a number of years have passed since the ATH-M50x came out because it still works well. Since this wired headset doesn’t rely on batteries or Bluetooth technology, it’s bound to outlast its wireless counterparts. The no-nonsense performance, fit, and comfort of the Audio-Technica ATH-M50x make it worth picking up."
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 M50x 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.
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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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