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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 11, 2024·
If you prefer wireless convenience and frequently make calls, use the JBL Tune Flex; they're suited for exercise with sweatproof certification and have better controls for taking calls. However, Koss KSC75 headphones, while wired and less suitable for exercise, offer excellent sound quality for music at a budget price. The JBLs have a "Low Latency Mode" ideal for videos and gaming, while the Koss lack modern features such as noise cancellation, wireless capability, and an inbuilt microphone. Consider the JBLs for modern, versatile use and the Koss for basic, high-quality audio on a budget. 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
- Very good for gaming
- Good for exercise
- Very good for air travel
- Excellent for podcasts and audiobooks
Advantages of the Koss KSC75
- Very good for music
Key differences
Music
7.3
8.3
The Koss KSC75 is very good for music, while the JBL Tune Flex is good.
Gaming
8.5
6.4
The JBL Tune Flex is very good for gaming, while the Koss KSC75 is only fair.
Phone Calls
6.3
4.8
The JBL Tune Flex is only fair for phone calls, while the Koss KSC75 is poor.
Podcasts and Audiobooks
9.0
7.5
The JBL Tune Flex is excellent for podcasts and audiobooks, while the Koss KSC75 is good.
Noise Reduction
6.5
2.5
The JBL Tune Flex is only fair for noise reduction, while the Koss KSC75 is poor.
Battery
6.5 Hours
N/A
The JBL Tune Flex has 6.5 hours of battery life. The Koss KSC75 does not have a battery.
Cost
$60
$20
$0
$20
$40
$60
$80
$100
The JBL Tune Flex has a price of $60 and the Koss KSC75 costs $20.
Build Quality
8.5
5.6
The JBL Tune Flex has very good build quality, while the Koss KSC75 has poor build quality.
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Key similarities
TV and Video
7.8
7.7
The JBL Tune Flex and Koss KSC75 are both good for TV and video.
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How the JBL Tune Flex and the Koss KSC75 compare to other earbuds and headphones
Spec Comparison
 |  | |
| JBL Tune Flex | Koss KSC75 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$60 | $20 | ||
Brand | |||
Brand | JBL | Koss | |
Release Date | |||
Release Date | September 1, 2022 | January 1, 2005 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 7.3/10 | 8.3/10 | |
Phone Calls Score | |||
Phone Calls Score | 6.3/10 | 4.9/10 | |
Gaming Score | |||
Gaming Score | 8.6/10 | 6.5/10 | |
TV and Video Score | |||
TV and Video Score | 7.8/10 | 7.7/10 | |
Exercise Score | |||
Exercise Score | 7.7/10 | 4.3/10 | |
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 | 2.5/10 | |
Virtual Surround | |||
Virtual Surround | No | N/A | |
Android App | |||
Android App | Yes | N/A | |
iOS App | |||
iOS App | Yes | N/A | |
Mic Quality | |||
Mic Quality | 5.1/10 | N/A | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 5.7/10 | |
Comfort score | |||
Comfort score | 7.6/10 | 7/10 | |
Size | |||
Size | Large | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 9 Grams | 45.3 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
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."
Koss KSC75
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Dig into reviews and images
InEar Fidelity
Crinacle | June 2022
"Let’s not insult the KSC75 by saying that it’s simply good for the price… because it’s far more than that. It basically has a monopoly at its asking price, and could still give modern budget headphones a run for their money 15 years after its release. The KSC75 is the world’s best not-headphone."
Get a great deal on the JBL Tune Flex or the Koss KSC75
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 Koss
Koss is an American headphone manufacturer established in 1953. In 1958, they created the first set of stereophones, that is headphones with stereo sound, and in 1984 they released the world-famous Porta Pro, a set of on-ear headphones that has remained essentially unchanged for more than 30 years and that is still made, sold and loved by many audio enthusiasts around the world today.
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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
Joe Golden, Ph.D
CEO and Earbuds and Headphones Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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