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What we think
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Updated April 11, 2024·
If wireless convenience and exercise compatibility are important to you, the JBL Tune Flex with its low latency mode and sweatproof certification would be more suitable. However, if you prefer a wired connection and potentially better durability with a lower price, then the KZ ZSN Pro X is a good choice, though it lacks the wireless feature and has no app support for customization. The JBL's have active noise cancelling, beneficial for air travel and noisy environments, while the KZ's rely only on passive noise isolation. The JBL's also offer better sound quality for music and gaming, but for calls and meetings, both are only fair, with poor mic quality. 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 JBL Tune Flex
- Very good for gaming
- Good for exercise
- Very good for air travel
- Excellent for podcasts and audiobooks
Advantages of the KZ ZSN Pro X
- The KZ ZSN Pro X has no clear advantages over the JBL Tune Flex.
Key differences
Gaming
8.5
5.9
The JBL Tune Flex is very good for gaming, while the KZ ZSN Pro X is poor.
Phone Calls
6.3
3.1
The JBL Tune Flex is only fair for phone calls, while the KZ ZSN Pro X is poor.
Podcasts and Audiobooks
9.0
4.7
The JBL Tune Flex is excellent for podcasts and audiobooks, while the KZ ZSN Pro X is poor.
Noise Reduction
6.5
6.0
The JBL Tune Flex and KZ ZSN Pro X are both only fair for noise reduction, though the JBL Tune Flex is somewhat better.
Battery
6.5 Hours
N/A
The JBL Tune Flex has 6.5 hours of battery life. The KZ ZSN Pro X does not have a battery.
Cost
$60
$24
$0
$20
$40
$60
$80
$100
The JBL Tune Flex has a price of $60 and the KZ ZSN Pro X costs $24.
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Key similarities
Music
7.3
7.0
The JBL Tune Flex and KZ ZSN Pro X are both good for music.
TV and Video
7.8
7.3
The JBL Tune Flex and KZ ZSN Pro X are both good for TV and video.
Build Quality
8.5
8.5
The JBL Tune Flex and KZ ZSN Pro X both have very good build quality.
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How the JBL Tune Flex and the KZ ZSN Pro X compare to other earbuds and headphones
Spec Comparison
 |  | |
| JBL Tune Flex | KZ ZSN Pro X |
GENERAL | |||
|---|---|---|---|
| Price | |||
$60 | $24 | ||
Brand | |||
Brand | JBL | KZ | |
Release Date | |||
Release Date | September 1, 2022 | June 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Earbuds | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.3/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 6.3/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 8.6/10 | 6/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 7.3/10 | |
Exercise Score | |||
Exercise Score | 7.7/10 | 4.2/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 6.5 Hours | N/A | |
Wireless charging | |||
Wireless charging | No | N/A | |
Charging time | |||
Charging time | 2 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5.2 | N/A | |
Case Battery Life | |||
Case Battery Life | 18 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 6.5/10 | 6/10 | |
Virtual Surround | |||
Virtual Surround | No | No | |
Android App | |||
Android App | Yes | N/A | |
iOS App | |||
iOS App | Yes | N/A | |
Mic Quality | |||
Mic Quality | 5.1/10 | 2.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7/10 | |
Size | |||
Size | Large | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 9 Grams | 27 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Shopping
JBL Tune Flex
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Dig into reviews and images
MajorHiFi
Gabby Bloch | May 2023
"JBL is offering a similar design and arguably better resolution than the more expensive AirPods 3rd Generation. Add to that a comfortable and versatile fit, an equalizer and pretty decent ANC, and you’ve got a quality wireless earphone. I would have loved longer battery life and more crystal calls, but for the price, you can’t complain. A solid deal overall."
KZ ZSN Pro X
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Dig into reviews and images
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."
Get a great deal on the JBL Tune Flex or the KZ ZSN Pro X
About JBL
JBL is an American audio equipment manufacturer. Owned by Harman International which is, itself, owned by Samsung Electronics. JBL markets a wide array of monitoring speakers, professional headphones and consumer market headphones and earbuds. It was founded in 1946 by James Bullough Lansing (whose initials give the company its name) and has become one of the most prolific audio companies ever. Their products were responsible for audio during the 1969 Woodstock Festival.
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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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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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