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What we think
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Updated April 11, 2024·
If you value wireless convenience and features suited for an active lifestyle, like sweatproof certification and a low latency mode for gaming, the JBL Tune Flex may be better for you. These earbuds also offer active noise canceling for noisy environments and are optimized for use during exercise. However, for the best comfort during long listening sessions and superior call and gaming experience, the Sennheiser HD 400S headphones would be a better choice, especially given their very good microphone quality. Keep in mind though, the HD 400S are wired, lack active noise canceling, and are not as portable or exercise-friendly as the JBL Tune Flex. 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
- Very good for air travel
- Excellent for podcasts and audiobooks
Advantages of the Sennheiser HD 400S
- Very good for phone calls
Key differences
Phone Calls
6.3
8.2
The Sennheiser HD 400S is very good for phone calls, while the JBL Tune Flex is only fair.
Podcasts and Audiobooks
9.0
7.6
The JBL Tune Flex is excellent for podcasts and audiobooks, while the Sennheiser HD 400S is good.
Noise Reduction
6.5
5.3
The JBL Tune Flex is only fair for noise reduction, while the Sennheiser HD 400S is poor.
Battery
6.5 Hours
N/A
The JBL Tune Flex has 6.5 hours of battery life. The Sennheiser HD 400S does not have a battery.
Cost
$60
$50
$0
$20
$40
$60
$80
$100
The JBL Tune Flex has a price of $60 and the Sennheiser HD 400S costs $50.
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Key similarities
Music
7.3
7.1
The JBL Tune Flex and Sennheiser HD 400S are both good for music.
Gaming
8.5
8.6
The Sennheiser HD 400S and JBL Tune Flex are both very good for gaming.
TV and Video
7.8
7.6
The JBL Tune Flex and Sennheiser HD 400S are both good for TV and video.
Build Quality
8.5
8.5
The JBL Tune Flex and Sennheiser HD 400S both have very good build quality.
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How the JBL Tune Flex and the Sennheiser HD 400S compare to other earbuds and headphones
Spec Comparison
 |  | |
| JBL Tune Flex | Sennheiser HD 400S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$60 | $50 | ||
Brand | |||
Brand | JBL | Sennheiser | |
Release Date | |||
Release Date | September 1, 2022 | January 1, 2019 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.3/10 | 7.2/10 | |
Phone Calls Score | |||
Phone Calls Score | 6.3/10 | 8.2/10 | |
Gaming Score | |||
Gaming Score | 8.6/10 | 8.7/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 7.7/10 | |
Exercise Score | |||
Exercise Score | 7.7/10 | 4.2/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 6.5 Hours | N/A | |
Wireless charging | |||
Wireless charging | No | N/A | |
Charging time | |||
Charging time | 2 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5.2 | N/A | |
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 | 5.3/10 | |
Virtual Surround | |||
Virtual Surround | No | No | |
Android App | |||
Android App | Yes | N/A | |
iOS App | |||
iOS App | Yes | N/A | |
Mic Quality | |||
Mic Quality | 5.1/10 | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 8.4/10 | |
Size | |||
Size | Large | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 9 Grams | 213 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 400S
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Headphone Dungeon
Jim | August 2022
"Sennheiser has done it again. The HD 400S performs well beyond its price range and is one of the better budget model headphones I’ve tried. It has very few bells and whistles and offers a simple means of listening that still delivers amazing clarity and quality. If you need a good first pair of headphones or need something that you can take out of the house, then the HD 400S is definitely for you."
Get a great deal on the JBL Tune Flex or the Sennheiser HD 400S
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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