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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
The Koss KSC75 offers great value, especially if you prefer open-back headphones for natural sound and comfort but at the expense of noise isolation. They're wired, making them unsuitable for exercise or wireless needs. On the other hand, the Razer Hammerhead True Wireless earbuds are a modern choice with better build quality, improved portability, and features like a microphone for calls and a low-latency gaming mode, but they are noticeably more expensive. If wireless convenience and gaming are priorities, the Razer Hammerheads are better; for budget-conscious music listening, consider the Koss KSC75. 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
- Good for podcasts and audiobooks
Advantages of the Razer Hammerhead True Wireless
- Very good for gaming
- Good for exercise
- Very good for air travel
Key differences
Music
8.3
6.6
The Koss KSC75 is very good for music, while the Razer Hammerhead True Wireless is only fair.
Gaming
6.4
8.6
The Razer Hammerhead True Wireless is very good for gaming, while the Koss KSC75 is only fair.
Phone Calls
4.8
5.4
The Razer Hammerhead True Wireless and Koss KSC75 are both poor for phone calls, though the Razer Hammerhead True Wireless is somewhat better.
Podcasts and Audiobooks
7.5
5.6
The Koss KSC75 is good for podcasts and audiobooks, while the Razer Hammerhead True Wireless is poor.
Noise Reduction
2.5
8.1
The Razer Hammerhead True Wireless is very good for noise reduction, while the Koss KSC75 is poor.
Battery
N/A
5.0 Hours
The Koss KSC75 does not have a battery. The Razer Hammerhead True Wireless has 5 hours of battery life.
Cost
$20
$100
$0
$50
$100
$150
$200
The Koss KSC75 has a price of $20 and the Razer Hammerhead True Wireless costs $100.
Build Quality
5.6
8.7
The Razer Hammerhead True Wireless has very good build quality, while the Koss KSC75 has poor build quality.
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Key similarities
TV and Video
7.7
7.9
The Razer Hammerhead True Wireless and Koss KSC75 are both good for TV and video.
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How the Koss KSC75 and the Razer Hammerhead True Wireless compare to other earbuds and headphones
Spec Comparison
 |  | |
| Koss KSC75 | Razer Hammerhead True Wireless |
GENERAL | |||
|---|---|---|---|
| Price | |||
$20 | $100 | ||
Brand | |||
Brand | Koss | Razer | |
Release Date | |||
Release Date | January 1, 2005 | August 1, 2021 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wireless | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.3/10 | 6.6/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.9/10 | 5.5/10 | |
Gaming Score | |||
Gaming Score | 6.5/10 | 8.7/10 | |
TV and Video Score | |||
TV and Video Score | 7.7/10 | 7.9/10 | |
Exercise Score | |||
Exercise Score | 4.3/10 | 7.3/10 | |
PERFORMANCE | |||
|---|---|---|---|
Battery life | |||
Battery life | N/A | 5 Hours | |
Wireless charging | |||
Wireless charging | N/A | No | |
Charging time | |||
Charging time | N/A | 1 Hours | |
Bluetooth version | |||
Bluetooth version | N/A | 5.2 | |
Case Battery Life | |||
Case Battery Life | N/A | 36 | |
FEATURES | |||
|---|---|---|---|
Active Noise Cancelling | |||
Active Noise Cancelling | No | Yes | |
Noise Reduction Score | |||
Noise Reduction Score | 2.5/10 | 8.2/10 | |
Virtual Surround | |||
Virtual Surround | N/A | No | |
Android App | |||
Android App | N/A | Yes | |
iOS App | |||
iOS App | N/A | Yes | |
Mic Quality | |||
Mic Quality | N/A | 8.5/10 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 5.7/10 | 8.7/10 | |
Comfort score | |||
Comfort score | 7/10 | 8.2/10 | |
Size | |||
Size | N/A | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 45.3 Grams | 5 Grams | |
Microphone style | |||
Microphone style | N/A | Integrated | |
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."
Razer Hammerhead True Wireless
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Dig into reviews and images
The Verge
Chris Welch | August 2019
"This latest set is more “Pro” than not in both looks and features: they offer active noise cancellation, a low-latency gaming mode, and have switched to a in-ear design with silicone tips. Just like many of the company’s laptops and gaming accessories, the 2021 Hammerhead True Wireless include Razer’s full Chroma RGB system. It makes for what Razer calls “the ultimate wireless earbud flex.”"
Get a great deal on the Koss KSC75 or the Razer Hammerhead True Wireless
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 Razer
Razer is an American-Singaporean hardware manufacturer aimed specifically toward the gaming market. They manufacture a very wide array of gaming laptops, tablets, phones, peripherals and, of course, headphones and earbuds both wired and wireless. Since 2016, Razer has owned the THX suite, aimed at quality assurance of audiovisual systems such as speaker sets, video game consoles and even movie theaters.
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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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Staff Expert & Software Engineer
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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.
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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.
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