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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 10, 2024·
If you are after portability and use during exercise, the JBL Tune Flex with its low latency mode, sweatproof certification, and earbud form factor may be better suited for active lifestyles. On the other hand, if you prioritize overall sound quality, including for music and TV, and want longer battery life without the need for a charging case, the Sennheiser HD 350BT with its over-ear design offers excellent sound and is built for comfort during extended listening sessions. Both provide good wireless connectivity, but the Sennheiser supports AAC codec for enhanced audio on Apple devices, while the JBL is optimized for Android; this could sway your decision based on your smartphone. Neither is particularly strong in noise isolation or suited for air travel where noise cancellation might be key. 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 Tune Flex
- Good for exercise
- Excellent for podcasts and audiobooks
Advantages of the Sennheiser HD 350BT
- Good for phone calls
- Excellent for gaming
- Excellent for TV and video
Key differences
Gaming
8.5
9.1
The Sennheiser HD 350BT is excellent for gaming, while the JBL Tune Flex is very good.
Phone Calls
6.3
7.4
The Sennheiser HD 350BT is good for phone calls, while the JBL Tune Flex is only fair.
Podcasts and Audiobooks
9.0
8.3
The JBL Tune Flex is excellent for podcasts and audiobooks, while the Sennheiser HD 350BT is very good.
TV and Video
7.8
9.0
The Sennheiser HD 350BT is excellent for TV and video, while the JBL Tune Flex is good.
Noise Reduction
6.5
6.0
The JBL Tune Flex and Sennheiser HD 350BT are both only fair for noise reduction, though the JBL Tune Flex is somewhat better.
Battery
6.5 Hours
33.0 Hours
The JBL Tune Flex has 6.5 hours of battery life. The Sennheiser HD 350BT has 33 hours of battery life.
Cost
$60
$50
$0
$20
$40
$60
$80
$100
The JBL Tune Flex has a price of $60 and the Sennheiser HD 350BT costs $50.
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Key similarities
Music
7.3
7.0
The JBL Tune Flex and Sennheiser HD 350BT are both good for music.
Build Quality
8.5
8.2
The JBL Tune Flex and Sennheiser HD 350BT both have very good build quality.
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How the JBL Tune Flex and the Sennheiser HD 350BT compare to other earbuds and headphones
Spec Comparison
 |  | |
| JBL Tune Flex | Sennheiser HD 350BT |
GENERAL | |||
|---|---|---|---|
| Price | |||
$60 | $50 | ||
Brand | |||
Brand | JBL | Sennheiser | |
Release Date | |||
Release Date | September 1, 2022 | January 1, 2020 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wireless | Wireless | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.3/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 6.3/10 | 7.4/10 | |
Gaming Score | |||
Gaming Score | 8.6/10 | 9.1/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 9.1/10 | |
Exercise Score | |||
Exercise Score | 7.7/10 | 6.3/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 6.5 Hours | 33 Hours | |
Wireless charging | |||
Wireless charging | No | No | |
Charging time | |||
Charging time | 2 Hours | 2 Hours | |
Bluetooth version | |||
Bluetooth version | 5.2 | 5 | |
Case Battery Life | |||
Case Battery Life | 18 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 6.5/10 | 6/10 | |
Virtual Surround | |||
Virtual Surround | No | No | |
Android App | |||
Android App | Yes | Yes | |
iOS App | |||
iOS App | Yes | Yes | |
Mic Quality | |||
Mic Quality | 5.1/10 | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8.2/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7.6/10 | |
Size | |||
Size | Large | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 9 Grams | 238 Grams | |
Microphone style | |||
Microphone style | Integrated | Integrated | |
Shopping
JBL Tune Flex
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Dig into reviews and images
MajorHiFi
Gabby Bloch | May 2023
"JBL is offering a similar design and arguably better resolution than the more expensive AirPods 3rd Generation. Add to that a comfortable and versatile fit, an equalizer and pretty decent ANC, and you’ve got a quality wireless earphone. I would have loved longer battery life and more crystal calls, but for the price, you can’t complain. A solid deal overall."
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 Tune Flex 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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About the Earbuds or Headphones team
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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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