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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The Bose QuietComfort 45 headphones offer active noise cancellation and are built for comfort for long listening sessions, making them ideal if you need to block out surrounding noise and prioritize comfort. On the other hand, the Koss KSC75 are on-ear clip headphones that do not have noise cancellation but are highly portable and offer good sound quality for their price. If budget is a major concern, consider the KSC75; however, if you often find yourself in noisy environments and value a more immersive listening experience and comfort, the Bose QuietComfort 45 may justify the extra expense. The Bose also typically features a microphone for calls, which the KSC75 lacks. 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 Quiet Comfort 45
- Very good for phone calls
- Best in class for air travel
- Excellent for podcasts and audiobooks
Advantages of the Koss KSC75
- Very good for music
- Good for TV and video
Key differences
Music
6.4
8.3
The Koss KSC75 is very good for music, while the Bose Quiet Comfort 45 is only fair.
Gaming
5.5
6.4
The Koss KSC75 is only fair for gaming, while the Bose Quiet Comfort 45 is poor.
Phone Calls
8.0
4.8
The Bose Quiet Comfort 45 is very good for phone calls, while the Koss KSC75 is poor.
Podcasts and Audiobooks
9.3
7.5
The Bose Quiet Comfort 45 is excellent for podcasts and audiobooks, while the Koss KSC75 is good.
TV and Video
5.8
7.7
The Koss KSC75 is good for TV and video, while the Bose Quiet Comfort 45 is poor.
Noise Reduction
10.0
2.5
The Bose Quiet Comfort 45 is best in class for noise reduction, while the Koss KSC75 is poor.
Battery
22.5 Hours
N/A
The Bose Quiet Comfort 45 has 22.5 hours of battery life. The Koss KSC75 does not have a battery.
Cost
$260
$20
$0
$100
$200
$300
$400
The Bose Quiet Comfort 45 has a price of $260 and the Koss KSC75 costs $20.
Build Quality
8.5
5.6
The Bose Quiet Comfort 45 has very good build quality, while the Koss KSC75 has poor build quality.
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How the Bose Quiet Comfort 45 and the Koss KSC75 compare to other earbuds and headphones
Spec Comparison
 |  | |
| Bose Quiet Comfort 45 | Koss KSC75 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$260 | $20 | ||
Brand | |||
Brand | Bose | Koss | |
Release Date | |||
Release Date | September 1, 2021 | January 1, 2005 | |
Form Factor | |||
Form Factor | Headphones | Headphones | |
Connectivity | |||
Connectivity | Wired + Wireless | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 6.5/10 | 8.3/10 | |
Phone Calls Score | |||
Phone Calls Score | 8/10 | 4.9/10 | |
Gaming Score | |||
Gaming Score | 5.6/10 | 6.5/10 | |
TV and Video Score | |||
TV and Video Score | 5.8/10 | 7.7/10 | |
Exercise Score | |||
Exercise Score | 6.4/10 | 4.3/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | 22.5 Hours | N/A | |
Wireless charging | |||
Wireless charging | No | N/A | |
Charging time | |||
Charging time | 3 Hours | N/A | |
Bluetooth version | |||
Bluetooth version | 5.1 | N/A | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | Yes | No | |
Noise Reduction Score | |||
Noise Reduction Score | 10/10 | 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 | 7/10 | N/A | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 8.5/10 | 5.7/10 | |
Comfort score | |||
Comfort score | 10/10 | 7/10 | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 235.8 Grams | 45.3 Grams | |
Microphone style | |||
Microphone style | Integrated | N/A | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
Bose Quiet Comfort 45
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Dig into reviews and images
What HiFi?
What HiFi? | November 2022
"If you want a set of wireless over-ear headphones you can put on, deploy noise-cancelling on your commute or at your desk and largely extinguish the outside world for up to 24 hours, the Bose QC 45 has the edge over most of the competition at the price."
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 Bose Quiet Comfort 45 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.
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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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