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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The Sennheiser CX300S earbuds are wired and provide a good balance of sound quality and noise isolation; however, they lack a microphone and do not support wireless connectivity. On the other hand, the Soundcore Space A40 are wireless with a microphone, offer a slightly better overall sound quality, and include active noise cancelling, which can be a game-changer for travel and noisy environments. The Space A40 also features an app with equalizer and controls customization not found in the CX300S. If you enjoy the convenience of wireless earbuds and active noise cancelling, while also prioritizing call quality and the ability to customize settings, the Soundcore Space A40 may justify the slightly higher price. Yet, if you prefer wired connections and do not need extras like a microphone or noise cancellation, the CX300S could be a more cost-effective solution. 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 Sennheiser CX300S
- Good for TV and video
Advantages of the Soundcore Space A40
- Good for music
- Very good for air travel
Key differences
Music
6.9
7.7
The Soundcore Space A40 is good for music, while the Sennheiser CX300S is only fair.
Gaming
6.1
4.9
The Sennheiser CX300S is only fair for gaming, while the Soundcore Space A40 is poor.
Phone Calls
3.0
4.8
The Soundcore Space A40 and Sennheiser CX300S are both poor for phone calls, though the Soundcore Space A40 is somewhat better.
TV and Video
7.3
5.3
The Sennheiser CX300S is good for TV and video, while the Soundcore Space A40 is poor.
Noise Reduction
7.0
9.1
The Soundcore Space A40 is excellent for noise reduction, while the Sennheiser CX300S is good.
Battery
N/A
8.0 Hours
The Sennheiser CX300S does not have a battery. The Soundcore Space A40 has 8 hours of battery life.
Cost
$50
$80
$0
$20
$40
$60
$80
$100
The Sennheiser CX300S has a price of $50 and the Soundcore Space A40 costs $80.
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Key similarities
Podcasts and Audiobooks
4.7
4.9
The Soundcore Space A40 and Sennheiser CX300S are both poor for podcasts and audiobooks.
Build Quality
8.0
8.5
The Soundcore Space A40 and Sennheiser CX300S both have very good build quality.
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How the Sennheiser CX300S and the Soundcore Space A40 compare to other earbuds and headphones
Spec Comparison
 |  | |
| Sennheiser CX300S | Soundcore Space A40 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$50 | $80 | ||
Brand | |||
Brand | Sennheiser | Soundcore | |
Release Date | |||
Release Date | February 1, 2019 | August 1, 2022 | |
Form Factor | |||
Form Factor | Earbuds | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wireless | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7/10 | 7.8/10 | |
Phone Calls Score | |||
Phone Calls Score | 3.1/10 | 4.9/10 | |
Gaming Score | |||
Gaming Score | 6.1/10 | 5/10 | |
TV and Video Score | |||
TV and Video Score | 7.4/10 | 5.4/10 | |
Exercise Score | |||
Exercise Score | 4.2/10 | 6.2/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | N/A | 8 Hours | |
Wireless charging | |||
Wireless charging | N/A | Yes | |
Charging time | |||
Charging time | N/A | 0.8 Hours | |
Bluetooth version | |||
Bluetooth version | N/A | 5.2 | |
Case Battery Life | |||
Case Battery Life | N/A | 32 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | Yes | |
Noise Reduction Score | |||
Noise Reduction Score | 7/10 | 9.1/10 | |
Virtual Surround | |||
Virtual Surround | No | N/A | |
Android App | |||
Android App | N/A | Yes | |
iOS App | |||
iOS App | N/A | Yes | |
Mic Quality | |||
Mic Quality | N/A | 6/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7.6/10 | |
Size | |||
Size | Small | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 12 Grams | 4 Grams | |
Microphone style | |||
Microphone style | N/A | Integrated | |
Shopping
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."
Soundcore Space A40
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Dig into reviews and images
Sound Guys
Sam Smart | May 2023
"The Anker Soundcore Space A40 is an excellent deal if you want affordable noise canceling earbuds with great sound. The baseline frequency response is enjoyable, and the many EQ presets to choose from plus the ability to customize your sound profile makes it good for pretty much anyone. The noise canceling is quite good, and the many ear tips to choose from ensure a good fit for the noise canceling and isolation to do its job."
Get a great deal on the Sennheiser CX300S or the Soundcore Space A40
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.
About Soundcore
Soundcore is a sub-brand belonging to Anker Innovations. Starting in 2014, initially marketing wireless, Bluetooth, speakers, Anker now offers an array of, budget-friendly, wireless earbuds and headphones that directly compete, especially in the Active Noise Canceling field, with other brands several times as expensive.
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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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