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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 11, 2024·
If you prioritize overall sound quality for music, the 7hz Timeless has very good performance in that department, whereas the KZ ZSN Pro X is good. The Timeless also has a larger soundstage, which could enhance your listening immersion, but keep in mind that it may not be as comfortable for long sessions as the ZSN Pro X and its microphone quality is inferior which makes it less suitable for calls. Neither of these is wireless, so consider this if convenience without cords is important to you. The Timeless has planar drivers known for their sound quality, while the ZSN Pro X uses a combination of balanced armature and dynamic drivers. Neither supports features like active noise cancelling or sweatproof certifications, so they may not be ideal for noisy environments or intense workouts. The Timeless doesn’t perform well during exercise or travel and has poor portability due to its size, so the ZSN Pro X might be a better choice if portability is a priority for you. 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 7hz Timeless
- Very good for music
Advantages of the KZ ZSN Pro X
- Good for air travel
Key differences
Music
8.6
7.0
The 7hz Timeless is very good for music, while the KZ ZSN Pro X is good.
Gaming
6.6
5.9
The 7hz Timeless is only fair for gaming, while the KZ ZSN Pro X is poor.
Phone Calls
4.3
3.1
The 7hz Timeless and KZ ZSN Pro X are both poor for phone calls, though the 7hz Timeless is somewhat better.
Podcasts and Audiobooks
6.8
4.7
The 7hz Timeless is only fair for podcasts and audiobooks, while the KZ ZSN Pro X is poor.
Noise Reduction
5.3
6.0
The KZ ZSN Pro X is only fair for noise reduction, while the 7hz Timeless is poor.
Cost
$185
$22
$0
$50
$100
$150
$200
$250
$300
The 7hz Timeless has a price of $185 and the KZ ZSN Pro X costs $22.
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Key similarities
TV and Video
7.8
7.3
The 7hz Timeless and KZ ZSN Pro X are both good for TV and video.
Build Quality
8.5
8.5
The 7hz Timeless and KZ ZSN Pro X both have very good build quality.
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How the 7hz Timeless and the KZ ZSN Pro X compare to other earbuds and headphones
Spec Comparison
 |  | |
| 7hz Timeless | KZ ZSN Pro X |
GENERAL | |||
|---|---|---|---|
| Price | |||
$185 | $22 | ||
Brand | |||
Brand | 7hz | KZ | |
Release Date | |||
Release Date | August 1, 2021 | June 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.6/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.3/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 6.7/10 | 6/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 7.3/10 | |
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 | 6/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
Mic Quality | |||
Mic Quality | N/A | 2.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 7/10 | 7/10 | |
Size | |||
Size | Large | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 5.5 Grams | 27 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
7hz Timeless
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Dig into reviews and images
Headphonesty
Kazi Mahbub Mutakabbir | May 2023
"7Hz picked a bold name for the Timeless and frankly, got very close to justifying their word choice. Most importantly, the Timeless are good to go in stock form, so you don’t have to worry about source-matching and such. I can recommend the 7Hz Timeless to those who do not mind a dash of brightness up top, want a taste of planar in IEM form, and want one of the most resolving pair of earphones in the $150 - $300 price range."
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."
Get a great deal on the 7hz Timeless or the KZ ZSN Pro X
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Why trust us
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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