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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The KZ ZSN Pro earbuds with a microphone are a budget-friendly option, great for on-the-go calls and casual listening, but they may not match the audio quality and comfort of the Sennheiser 450BT headphones. The Sennheiser 450BT offers superior sound, noise cancellation, and wireless convenience, but it comes at a higher price. If you're an audiophile or frequent traveler, the noise cancellation and comfort of the Sennheiser might justify the cost. However, if you're looking for value and primarily need earbuds for calls or light use, the KZ ZSN Pro will save you money without a significant compromise in functionality. 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 (with Mic)
- Good for music
Advantages of the Sennheiser 450BT
- Very good for TV and video
- Excellent for air travel
- Good for podcasts and audiobooks
Key differences
Music
7.7
6.2
The KZ ZSN Pro (with Mic) is good for music, while the Sennheiser 450BT is only fair.
Gaming
8.0
8.8
The Sennheiser 450BT and KZ ZSN Pro (with Mic) are both very good for gaming, though the Sennheiser 450BT is somewhat better.
Phone Calls
5.1
6.9
The Sennheiser 450BT is only fair for phone calls, while the KZ ZSN Pro (with Mic) is poor.
Podcasts and Audiobooks
4.9
7.9
The Sennheiser 450BT is good for podcasts and audiobooks, while the KZ ZSN Pro (with Mic) is poor.
TV and Video
7.4
8.1
The Sennheiser 450BT is very good for TV and video, while the KZ ZSN Pro (with Mic) is good.
Noise Reduction
5.3
9.1
The Sennheiser 450BT is excellent for noise reduction, while the KZ ZSN Pro (with Mic) is poor.
Battery
N/A
27.5 Hours
The KZ ZSN Pro (with Mic) does not have a battery. The Sennheiser 450BT has 27.5 hours of battery life.
Cost
$24
$90
$0
$50
$100
$150
$200
The KZ ZSN Pro (with Mic) has a price of $24 and the Sennheiser 450BT costs $90.
Build Quality
9.0
8.0
The KZ ZSN Pro (with Mic) has excellent build quality, while the Sennheiser 450BT has very good build quality.
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How the KZ ZSN Pro (with Mic) and the Sennheiser 450BT compare to other earbuds and headphones
Spec Comparison
 |  | |
| KZ ZSN Pro (with Mic) | Sennheiser 450BT |
GENERAL | |||
|---|---|---|---|
| Price | |||
$24 | $90 | ||
Brand | |||
Brand | KZ | Sennheiser | |
Release Date | |||
Release Date | March 1, 2019 | February 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wired | Wired + Wireless | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.8/10 | 6.2/10 | |
Phone Calls Score | |||
Phone Calls Score | 5.1/10 | 7/10 | |
Gaming Score | |||
Gaming Score | 8/10 | 8.9/10 | |
TV and Video Score | |||
TV and Video Score | 7.5/10 | 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 | 7/10 | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 9/10 | 8/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7/10 | |
Size | |||
Size | Large | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 7 Grams | 240.4 Grams | |
Microphone style | |||
Microphone style | In-Line | Integrated | |
Shopping
KZ ZSN Pro (with Mic)
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Dig into reviews and images
PrimeAudio
David Becker | 2019
"Undoubtedly the focus and the star of the show, the ZSN Pro’s bass is big, bold and bangin’. The amount of gusto in the low end should satisfy anyone who likes a large lick of bass and even certified bassheads will probably get a kick out of this."
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 KZ ZSN Pro (with Mic) 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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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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