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What we think
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Updated April 11, 2024·
If portability and use during exercise are priorities for you, the JBL Live Flex 3 earbuds are better due to their sweatproof certification and very good use during exercise score; plus, they have a unique Smart Charging Case with LED touch display. However, if you're focused on the best audio experience for music, gaming, and TV, and can sacrifice portability, the Sennheiser HD 350BT headphones offer excellent performance in those areas, active noise cancelling, and are typically much less expensive. Neither are great for calls and meetings, but the JBL has very good noise isolation for air travel or noisy environments. 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 Live Flex 3
- Very good for music
- Very good for exercise
Advantages of the Sennheiser HD 350BT
- Good for phone calls
- Excellent for gaming
- Excellent for TV and video
- Very good for air travel
- Very good for podcasts and audiobooks
Key differences
Music
8.0
7.0
The JBL Live Flex 3 is very good for music, while the Sennheiser HD 350BT is good.
Gaming
5.5
9.1
The Sennheiser HD 350BT is excellent for gaming, while the JBL Live Flex 3 is poor.
Phone Calls
5.2
7.4
The Sennheiser HD 350BT is good for phone calls, while the JBL Live Flex 3 is poor.
Podcasts and Audiobooks
5.9
8.3
The Sennheiser HD 350BT is very good for podcasts and audiobooks, while the JBL Live Flex 3 is poor.
TV and Video
5.7
9.0
The Sennheiser HD 350BT is excellent for TV and video, while the JBL Live Flex 3 is poor.
Noise Reduction
8.3
6.0
The JBL Live Flex 3 is very good for noise reduction, while the Sennheiser HD 350BT is only fair.
Battery
10.0 Hours
33.0 Hours
The JBL Live Flex 3 has 10 hours of battery life. The Sennheiser HD 350BT has 33 hours of battery life.
Cost
$216
$80
$50
$100
$150
$200
$250
$300
The JBL Live Flex 3 has a price of $216 and the Sennheiser HD 350BT costs $80.
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Key similarities
Build Quality
8.5
8.2
The JBL Live Flex 3 and Sennheiser HD 350BT both have very good build quality.
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How the JBL Live Flex 3 and the Sennheiser HD 350BT compare to other earbuds and headphones
Spec Comparison
 |  | |
| JBL Live Flex 3 | Sennheiser HD 350BT |
GENERAL | |||
|---|---|---|---|
| Price | |||
$216 | $80 | ||
Brand | |||
Brand | JBL | Sennheiser | |
Release Date | |||
Release Date | June 1, 2024 | January 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wireless | Wireless | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.1/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 5.3/10 | 7.4/10 | |
Gaming Score | |||
Gaming Score | 5.5/10 | 9.1/10 | |
TV and Video Score | |||
TV and Video Score | 5.8/10 | 9.1/10 | |
Exercise Score | |||
Exercise Score | 8.4/10 | 6.3/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 10 Hours | 33 Hours | |
Wireless charging | |||
Wireless charging | Yes | No | |
Charging time | |||
Charging time | 2 Hours | 2 Hours | |
Bluetooth version | |||
Bluetooth version | 5.3 | 5 | |
Case Battery Life | |||
Case Battery Life | 40 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 8.4/10 | 6/10 | |
Virtual Surround | |||
Virtual Surround | Yes | No | |
Android App | |||
Android App | Yes | Yes | |
iOS App | |||
iOS App | Yes | Yes | |
Mic Quality | |||
Mic Quality | 7/10 | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8.2/10 | |
Comfort score | |||
Comfort score | 7/10 | 7.6/10 | |
Size | |||
Size | Large | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 8.8 Grams | 238 Grams | |
Microphone style | |||
Microphone style | Integrated | Integrated | |
Shopping
Sennheiser HD 350BT
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Soundguys
Lily Katz | September 2023
"Sennheiser nails just nearly everything about the Sennheiser HD 350BT headphones. Sound quality is excellent, and the high-quality Bluetooth codec support is a rarity at this price point. If you don’t care for high-tech features like automatic ear detection, you’ll be delighted with these portable headphones."
Get a great deal on the JBL Live Flex 3 or the Sennheiser HD 350BT
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.
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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