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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The 7hz Timeless offers a more detailed sound experience, ideal for audiophiles who appreciate the nuances in high-quality audio recordings. They are also built with planar magnetic drivers that tend to have a faster response and hence could better articulate the details in complex music passages. However, they are more expensive, which can be a significant consideration. On the other hand, the Sennheiser CX300S provides a good balance of sound quality and affordability. They are a solid choice for everyday use such as commuting or casual listening. If budget is a concern, the Sennheiser CX300S offers the essentials without a hefty price tag, but if you are after a superior audio experience and are willing to invest more, the 7hz Timeless could be the better option. 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 Sennheiser CX300S
- Good for air travel
Key differences
Music
8.6
6.9
The 7hz Timeless is very good for music, while the Sennheiser CX300S is only fair.
Gaming
6.6
6.1
The 7hz Timeless and Sennheiser CX300S are both only fair for gaming, though the 7hz Timeless is somewhat better.
Phone Calls
4.3
3.0
The 7hz Timeless and Sennheiser CX300S 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 Sennheiser CX300S is poor.
Noise Reduction
5.3
7.0
The Sennheiser CX300S is good for noise reduction, while the 7hz Timeless is poor.
Cost
$185
$41
$0
$50
$100
$150
$200
$250
$300
The 7hz Timeless has a price of $185 and the Sennheiser CX300S costs $41.
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Key similarities
TV and Video
7.8
7.3
The 7hz Timeless and Sennheiser CX300S are both good for TV and video.
Build Quality
8.5
8.0
The 7hz Timeless and Sennheiser CX300S both have very good build quality.
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How the 7hz Timeless and the Sennheiser CX300S compare to other earbuds and headphones
Spec Comparison
 |  | |
| 7hz Timeless | Sennheiser CX300S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$185 | $41 | ||
Brand | |||
Brand | 7hz | Sennheiser | |
Release Date | |||
Release Date | August 1, 2021 | February 1, 2019 | |
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 | 6.1/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 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 | 7/10 | 7.6/10 | |
Size | |||
Size | Large | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 5.5 Grams | 12 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."
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 7hz Timeless or the Sennheiser CX300S
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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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.
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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