A comparison of specs, key information, reviews, and best pricing from top retailers
Last updated -- hours ago | Report incorrect information
Company ProductName Specs
Company ProductName Specs
What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
If you prioritize top-notch sound quality, comfort during long listening sessions, effective noise isolation, and the ability to customize your experience through an app, the Bose QuietComfort Ultra Earbuds are an excellent choice. They also offer active noise cancelling for peaceful listening in noisy environments and are suitable for sweat-prone activities. On the other hand, the Koss KSC75 headphones stand out for their affordability and lightweight open design that keeps you aware of your surroundings. However, they are wired, provide less isolation from ambient noise, and lack features such as a microphone, built-in controls, and app support that come with the Bose earbuds. 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 Bose QuietComfort Ultra Earbuds
- Very good for gaming
- Very good for TV and video
- Very good for exercise
- Very good for air travel
Advantages of the Koss KSC75
- Good for podcasts and audiobooks
Key differences
Gaming
8.8
6.4
The Bose QuietComfort Ultra Earbuds is very good for gaming, while the Koss KSC75 is only fair.
Podcasts and Audiobooks
6.0
7.5
The Koss KSC75 is good for podcasts and audiobooks, while the Bose QuietComfort Ultra Earbuds is only fair.
Noise Reduction
8.9
2.5
The Bose QuietComfort Ultra Earbuds is very good for noise reduction, while the Koss KSC75 is poor.
Battery
6.5 Hours
N/A
The Bose QuietComfort Ultra Earbuds has 6.5 hours of battery life. The Koss KSC75 does not have a battery.
Cost
$249
$20
$0
$50
$100
$150
$200
$250
$300
$350
The Bose QuietComfort Ultra Earbuds has a price of $249 and the Koss KSC75 costs $20.
Build Quality
9.0
5.6
The Bose QuietComfort Ultra Earbuds has excellent build quality, while the Koss KSC75 has poor build quality.
Let Us Help Find Your Perfect Headphones
Find your new headphones
Key similarities
Music
8.6
8.3
The Bose QuietComfort Ultra Earbuds and Koss KSC75 are both very good for music.
Phone Calls
5.1
4.8
The Bose QuietComfort Ultra Earbuds and Koss KSC75 are both poor for phone calls.
TV and Video
8.1
7.7
Although they have very similar scores, PerfectRec considers Bose QuietComfort Ultra Earbuds to be very good for TV and video, while the Koss KSC75 is good.
Give feedback
We’re constantly working to improve.
How the Bose QuietComfort Ultra Earbuds and the Koss KSC75 compare to other earbuds and headphones
Spec Comparison
 |  | |
| Bose QuietComfort Ultra Earbuds | Koss KSC75 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$249 | $20 | ||
Brand | |||
Brand | Bose | Koss | |
Release Date | |||
Release Date | September 1, 2023 | January 1, 2005 | |
Form Factor | |||
Form Factor | Earbuds | Headphones | |
Connectivity | |||
Connectivity | Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.7/10 | 8.3/10 | |
Phone Calls Score | |||
Phone Calls Score | 5.1/10 | 4.9/10 | |
Gaming Score | |||
Gaming Score | 8.8/10 | 6.5/10 | |
TV and Video Score | |||
TV and Video Score | 8.2/10 | 7.7/10 | |
Exercise Score | |||
Exercise Score | 8.4/10 | 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 | 5.3 | N/A | |
Case Battery Life | |||
Case Battery Life | 21 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 8.9/10 | 2.5/10 | |
Virtual Surround | |||
Virtual Surround | Yes | N/A | |
Android App | |||
Android App | Yes | N/A | |
iOS App | |||
iOS App | Yes | N/A | |
Mic Quality | |||
Mic Quality | 6.2/10 | N/A | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 9/10 | 5.7/10 | |
Comfort score | |||
Comfort score | 8.4/10 | 7/10 | |
Size | |||
Size | Medium | N/A | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 7.7 Grams | 45.3 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Shopping
Bose QuietComfort Ultra Earbuds
See more
Dig into reviews and images
Soundguys
Christian Thomas | October 2023
"Bose put the time in to fix the major issues with the previous earbuds, and the Bose QuietComfort Ultra Earbuds are very befitting of its price point. While you might be tempted to save a few bucks and go with the Bose QuietComfort Earbuds II on sale, fight the urge. There are enough upgrades here to justify the newer model."
Koss KSC75
See more
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 Bose QuietComfort Ultra Earbuds or the Koss KSC75
About Bose
Bose is an American audio equipment manufacturer based out of Framingham, Massachusetts. Founded in 1964 by Amar Bose with the goal of creating a speaker system that could accurately recreate the sound of a concert hall, Bose has become one of the most prominent players in the modern consumer audio market due to the premium feel of their products and their wide brand recognition.
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.
Give feedback
We're constantly perfecting our model
Earbuds or Headphones guides you might be interested in
More comparisons for you
Compare Bose QuietComfort Ultra Earbuds vs. Sennheiser Momentum 4
VS
Compare Bose QuietComfort Ultra Earbuds vs. Sennheiser Momentum True Wireless 3
VS
Compare Bose QuietComfort Ultra Earbuds vs. Grado GT220
VS
Compare Koss KSC75 vs. Apple Earpods
VS
Compare Koss KSC75 vs. JBL Quantum 100
VS
Compare Koss KSC75 vs. Sony MDREX15AP
VS
FAQs
FAQs about earbuds and headphones
Why trust us
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.
By the numbers
108
Earbuds and headphones evaluated
11,340
Earbuds and headphones stats compiled
15
Proprietary Earbuds and headphones ratings developed
127,700
Recommendations made
19,155
Consumer hours saved
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.
Jason Lew
Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.
Chandradeep Chowdhury
Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.
Luis Torres
Earbuds and Headphones Expert
Luis is a Mexico-based headphones expert. He’s been making headphone recommendations for five years and has close to 100 pairs in his personal collection.
Featured in
