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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
When choosing between the 7hz Timeless and Sennheiser 450BT, consider your preferences and usage scenarios. The 7hz Timeless, despite its premium price, offers excellent music quality with high marks for overall sound and soundstage. However, it doesn't have a built-in microphone, making it less suitable for calls and meetings. On the other hand, the Sennheiser 450BT is more affordable and features good mic quality, active noise cancellation, and a long battery life, which makes it versatile for calls, travel, TV, and gaming due to its low latency feature. However, sound quality for music specifically is higher on the 7hz Timeless. If portability and using headphones during exercise are important, the 7hz may not be the best as they are large earbuds with no dustproof or sweatproof certification, while the Sennheiser headphones are foldable and come with their carry case, although they do not specify exercise suitability either. 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 450BT
- Very good for gaming
- Very good for TV and video
- Excellent for air travel
- Good for podcasts and audiobooks
Key differences
Music
8.6
6.2
The 7hz Timeless is very good for music, while the Sennheiser 450BT is only fair.
Gaming
6.6
8.8
The Sennheiser 450BT is very good for gaming, while the 7hz Timeless is only fair.
Phone Calls
4.3
6.9
The Sennheiser 450BT is only fair for phone calls, while the 7hz Timeless is poor.
Podcasts and Audiobooks
6.8
7.9
The Sennheiser 450BT is good for podcasts and audiobooks, while the 7hz Timeless is only fair.
Noise Reduction
5.3
9.1
The Sennheiser 450BT is excellent for noise reduction, while the 7hz Timeless is poor.
Battery
N/A
27.5 Hours
The 7hz Timeless does not have a battery. The Sennheiser 450BT has 27.5 hours of battery life.
Cost
$185
$139
$50
$100
$150
$200
$250
$300
The 7hz Timeless has a price of $185 and the Sennheiser 450BT costs $139.
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Key similarities
TV and Video
7.8
8.1
Although they have very similar scores, PerfectRec considers Sennheiser 450BT to be very good for TV and video, while the 7hz Timeless is good.
Build Quality
8.5
8.0
The 7hz Timeless and Sennheiser 450BT both have very good build quality.
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How the 7hz Timeless and the Sennheiser 450BT compare to other earbuds and headphones
Spec Comparison
 |  | |
| 7hz Timeless | Sennheiser 450BT |
GENERAL | |||
|---|---|---|---|
| Price | |||
$185 | $139 | ||
Brand | |||
Brand | 7hz | Sennheiser | |
Release Date | |||
Release Date | August 1, 2021 | February 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wired | Wired + Wireless | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.6/10 | 6.2/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.3/10 | 7/10 | |
Gaming Score | |||
Gaming Score | 6.7/10 | 8.9/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 8.1/10 | |
Exercise Score | |||
Exercise Score | 4.3/10 | 6.1/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | N/A | 27.5 Hours | |
Wireless charging | |||
Wireless charging | N/A | No | |
Charging time | |||
Charging time | N/A | 2.3 Hours | |
Bluetooth version | |||
Bluetooth version | N/A | 5 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | Yes | |
Noise Reduction Score | |||
Noise Reduction Score | 5.3/10 | 9.1/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
Android App | |||
Android App | N/A | Yes | |
iOS App | |||
iOS App | N/A | Yes | |
Mic Quality | |||
Mic Quality | N/A | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8/10 | |
Comfort score | |||
Comfort score | 7/10 | 7/10 | |
Size | |||
Size | Large | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 5.5 Grams | 240.4 Grams | |
Microphone style | |||
Microphone style | N/A | Integrated | |
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 450BT
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Sound Guys
Lily Katz | March 2022
"The Sennheiser HD 450BT is a very good pair of headphones for the price, noise canceling is good and sound quality is great—quite rare at this price point. Like any product, this headset isn’t without its faults."
Get a great deal on the 7hz Timeless or the Sennheiser 450BT
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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Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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