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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 11, 2024·
If you're on a budget and primarily listen to music, the KZ ZSN Pro X may suit you with good overall sound quality and a very good build, but it has a wired connection which limits mobility. The microphone and call quality are poor, making it less ideal for calls or online gaming. For wireless convenience, better noise isolation, and additional features like an app equalizer and sweatproof certification, the Soundcore Space A40 is superior, though at a higher price. Its active noise cancelling is excellent for air travel and busy environments but its optimized performance for Android and Apple devices also makes it a versatile choice. If exercise or portability are priorities, the lighter and sweatproof Space A40 earbuds are more suitable. 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 X
- Good for TV and video
Advantages of the Soundcore Space A40
- Very good for air travel
Key differences
Music
7.0
7.7
The Soundcore Space A40 and KZ ZSN Pro X are both good for music, though the Soundcore Space A40 is somewhat better.
Gaming
5.9
4.9
The KZ ZSN Pro X and Soundcore Space A40 are both poor for gaming, though the KZ ZSN Pro X is somewhat better.
Phone Calls
3.1
4.8
The Soundcore Space A40 and KZ ZSN Pro X are both poor for phone calls, though the Soundcore Space A40 is somewhat better.
TV and Video
7.3
5.3
The KZ ZSN Pro X is good for TV and video, while the Soundcore Space A40 is poor.
Noise Reduction
6.0
9.1
The Soundcore Space A40 is excellent for noise reduction, while the KZ ZSN Pro X is only fair.
Battery
N/A
8.0 Hours
The KZ ZSN Pro X does not have a battery. The Soundcore Space A40 has 8 hours of battery life.
Cost
$22
$80
$0
$20
$40
$60
$80
$100
The KZ ZSN Pro X has a price of $22 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 KZ ZSN Pro X are both poor for podcasts and audiobooks.
Build Quality
8.5
8.5
The KZ ZSN Pro X and Soundcore Space A40 both have very good build quality.
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How the KZ ZSN Pro X and the Soundcore Space A40 compare to other earbuds and headphones
Spec Comparison
 |  | |
| KZ ZSN Pro X | Soundcore Space A40 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$22 | $80 | ||
Brand | |||
Brand | KZ | Soundcore | |
Release Date | |||
Release Date | June 1, 2020 | 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 | 6/10 | 5/10 | |
TV and Video Score | |||
TV and Video Score | 7.3/10 | 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 | 6/10 | 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 | 2.5/10 | 6/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 7/10 | 7.6/10 | |
Size | |||
Size | Large | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 27 Grams | 4 Grams | |
Microphone style | |||
Microphone style | N/A | Integrated | |
Shopping
KZ ZSN Pro X
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Soundguys
Jasper Lastoria | April 2023
"The KZ ZSN PRO X offers superb sound for very little money, like under $30 USD. It has some rough edges with a plastic seam on the cable that can rub on your ear, and the bud is a bit large. The tech isn't cutting edge, but new doesn't always equal better. You should try it."
Soundcore Space A40
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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 KZ ZSN Pro X or the Soundcore Space A40
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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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.
Jason Lew
Staff Expert & Software Engineer
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.
Luis Torres
Earbuds and Headphones Expert
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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