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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The Koss KSC75 offers good overall sound quality and is notably less expensive, suitable for a tight budget, but has lower build quality, no microphone, and achieves modest noise isolation; they're ideal if you prioritize cost savings and a more open sound. The Sennheiser HD 400S, on the other hand, offers a comfortable over-ear design with better build quality and an integrated microphone, making them more suitable for calls and gaming, and they provide better noise isolation, but they come at a higher price. 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
- Very good for music
Advantages of the Sennheiser HD 400S
- Very good for phone calls
- Very good for gaming
- Good for air travel
Key differences
Music
8.3
7.1
The Koss KSC75 is very good for music, while the Sennheiser HD 400S is good.
Gaming
6.4
8.6
The Sennheiser HD 400S is very good for gaming, while the Koss KSC75 is only fair.
Phone Calls
4.8
8.2
The Sennheiser HD 400S is very good for phone calls, while the Koss KSC75 is poor.
Noise Reduction
2.5
5.3
The Sennheiser HD 400S and Koss KSC75 are both poor for noise reduction, though the Sennheiser HD 400S is somewhat better.
Cost
$20
$50
$0
$10
$20
$30
$40
$50
The Koss KSC75 has a price of $20 and the Sennheiser HD 400S costs $50.
Build Quality
5.6
8.5
The Sennheiser HD 400S has very good build quality, while the Koss KSC75 has poor build quality.
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Key similarities
Podcasts and Audiobooks
7.5
7.6
The Sennheiser HD 400S and Koss KSC75 are both good for podcasts and audiobooks.
TV and Video
7.7
7.6
The Koss KSC75 and Sennheiser HD 400S are both good for TV and video.
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How the Koss KSC75 and the Sennheiser HD 400S compare to other earbuds and headphones
Spec Comparison
 |  | |
| Koss KSC75 | Sennheiser HD 400S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$20 | $50 | ||
Brand | |||
Brand | Koss | Sennheiser | |
Release Date | |||
Release Date | January 1, 2005 | January 1, 2019 | |
Form Factor | |||
Form Factor | Headphones | Headphones | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.3/10 | 7.2/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.9/10 | 8.2/10 | |
Gaming Score | |||
Gaming Score | 6.5/10 | 8.7/10 | |
TV and Video Score | |||
TV and Video Score | 7.7/10 | 7.7/10 | |
Exercise Score | |||
Exercise Score | 4.3/10 | 4.2/10 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | No | |
Noise Reduction Score | |||
Noise Reduction Score | 2.5/10 | 5.3/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
Mic Quality | |||
Mic Quality | N/A | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 5.7/10 | 8.5/10 | |
Comfort score | |||
Comfort score | 7/10 | 8.4/10 | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 45.3 Grams | 213 Grams | |
Microphone style | |||
Microphone style | N/A | Integrated | |
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 HD 400S
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Dig into reviews and images
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 Koss KSC75 or the Sennheiser HD 400S
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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