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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated April 11, 2024·
For a budget-friendly option, the Koss KSC75 offers very good sound quality and is comfortable for regular use, but due to its open enclosure and clip-on design, it lacks in noise isolation, making it less ideal for noisy environments like air travel. It also has a poor microphone, build quality, and no built-in controls, which might not suit those who value durability and convenience. On the other hand, the Sennheiser IE600, while significantly more expensive, delivers best-in-class sound quality with excellent build and is suitable for a wide range of audio content, especially for TV and video with its superior soundstage. However, these earbuds also have a poor mic quality and no built-in controls, and like the Koss, are not the best for calls and meetings. Neither of these options are wireless, sweatproof, or have active noise cancelling, so if those features are important for your daily use, especially during exercise or commuting, you may want to consider other options. 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 Koss KSC75
- Good for podcasts and audiobooks
Advantages of the Sennheiser IE600
- Excellent for TV and video
Key differences
Phone Calls
4.8
3.5
The Koss KSC75 and Sennheiser IE600 are both poor for phone calls, though the Koss KSC75 is somewhat better.
Podcasts and Audiobooks
7.5
5.4
The Koss KSC75 is good for podcasts and audiobooks, while the Sennheiser IE600 is poor.
TV and Video
7.7
9.3
The Sennheiser IE600 is excellent for TV and video, while the Koss KSC75 is good.
Noise Reduction
2.5
7.0
The Sennheiser IE600 is good for noise reduction, while the Koss KSC75 is poor.
Cost
$20
$600
$0
$100
$200
$300
$400
The Koss KSC75 has a price of $20 and the Sennheiser IE600 costs $600.
Build Quality
5.6
9.0
The Sennheiser IE600 has excellent build quality, while the Koss KSC75 has poor build quality.
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Key similarities
Music
8.3
8.3
The Koss KSC75 and Sennheiser IE600 are both very good for music.
Gaming
6.4
6.7
The Sennheiser IE600 and Koss KSC75 are both only fair for gaming.
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How the Koss KSC75 and the Sennheiser IE600 compare to other earbuds and headphones
Spec Comparison
 |  | |
| Koss KSC75 | Sennheiser IE600 |
GENERAL | |||
|---|---|---|---|
| Price | |||
$20 | $600 | ||
Brand | |||
Brand | Koss | Sennheiser | |
Release Date | |||
Release Date | January 1, 2005 | June 1, 2022 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.3/10 | 8.3/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.9/10 | 3.5/10 | |
Gaming Score | |||
Gaming Score | 6.5/10 | 6.8/10 | |
TV and Video Score | |||
TV and Video Score | 7.7/10 | 9.3/10 | |
Exercise Score | |||
Exercise Score | 4.3/10 | 4.6/10 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | No | |
Noise Reduction Score | |||
Noise Reduction Score | 2.5/10 | 7/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
Mic Quality | |||
Mic Quality | N/A | 2.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 5.7/10 | 9/10 | |
Comfort score | |||
Comfort score | 7/10 | 8.4/10 | |
Size | |||
Size | N/A | Large | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 45.3 Grams | 6 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
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."
Sennheiser IE600
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Dig into reviews and images
Soundguys
Jasper Lastoria | August 2023
"If you've got the bucks, the Sennheiser IE 600 is a nice, upscale set of in-ear monitors made of a lightweight metal with an unusual texture. It comes with a suite of extras, and performs well at virtually every task."
Get a great deal on the Koss KSC75 or the Sennheiser IE600
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.
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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Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.
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