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What we think
The PerfectRec Earbuds or Headphones team Learn more
Updated January 10, 2024·
If you're considering price and are on a budget, Koss Porta Pro headphones may be more cost-effective. However, if sound isolation is important to you, the in-ear design of the Sennheiser CX300S could be advantageous, as they block out external noise better than the on-ear Porta Pros. The Sennheiser CX300S may also offer a more secure fit for active use, such as exercising. On the other hand, the Koss Porta Pros generally offer a wider soundstage due to their open-back design, which can provide a more immersive listening experience for home use, but at the cost of sound leakage that may disturb others around you. 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 Porta Pro
- Very good for music
Advantages of the Sennheiser CX300S
- Good for air travel
Key differences
Music
8.2
6.9
The Koss Porta Pro is very good for music, while the Sennheiser CX300S is only fair.
Phone Calls
4.3
3.0
The Koss Porta Pro and Sennheiser CX300S are both poor for phone calls, though the Koss Porta Pro is somewhat better.
Podcasts and Audiobooks
6.8
4.7
The Koss Porta Pro is only fair for podcasts and audiobooks, while the Sennheiser CX300S is poor.
Noise Reduction
2.5
7.0
The Sennheiser CX300S is good for noise reduction, while the Koss Porta Pro is poor.
Build Quality
6.0
8.0
The Sennheiser CX300S has very good build quality, while the Koss Porta Pro has only fair build quality.
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Key similarities
Gaming
6.4
6.1
The Koss Porta Pro and Sennheiser CX300S are both only fair for gaming.
TV and Video
7.6
7.3
The Koss Porta Pro and Sennheiser CX300S are both good for TV and video.
Cost
$49
$50
$0
$10
$20
$30
$40
$50
The Koss Porta Pro has a price of $49 and the Sennheiser CX300S costs $50.
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How the Koss Porta Pro and the Sennheiser CX300S compare to other earbuds and headphones
Spec Comparison
 |  | |
| Koss Porta Pro | Sennheiser CX300S |
GENERAL | |||
|---|---|---|---|
| Price | |||
$49 | $50 | ||
Brand | |||
Brand | Koss | Sennheiser | |
Release Date | |||
Release Date | January 1, 1984 | February 1, 2019 | |
Form Factor | |||
Form Factor | Headphones | Earbuds | |
Connectivity | |||
Connectivity | Wired | Wired | |
SOUND | |||
|---|---|---|---|
Music Score | |||
Music Score | 8.3/10 | 7/10 | |
Phone Calls Score | |||
Phone Calls Score | 4.3/10 | 3.1/10 | |
Gaming Score | |||
Gaming Score | 6.4/10 | 6.1/10 | |
TV and Video Score | |||
TV and Video Score | 7.7/10 | 7.4/10 | |
Exercise Score | |||
Exercise Score | 4.2/10 | 4.2/10 | |
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 | |
BUILD AND DESIGN | |||
|---|---|---|---|
Build Quality | |||
Build Quality | 6/10 | 8/10 | |
Comfort score | |||
Comfort score | 7/10 | 7.6/10 | |
Size | |||
Size | N/A | Small | |
Weight (headset or single earbud) | |||
Weight (headset or single earbud) | 63.5 Grams | 12 Grams | |
Waterproof Rating | |||
Waterproof Rating | 0 | 0 | |
Shopping
Koss Porta Pro
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Dig into reviews and images
Headphones.com
Sebastian Taboada | February 2022
"It’s clear to see why these have been such a popular choice amongst listeners for nearly four decades. It’s a charming pair of headphones that delivers a truly enjoyable listening experience and one that I think punches well above its weight."
Sennheiser CX300S
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Dig into reviews and images
Major HiFi
Carroll Moore | April 2019
"Sennheiser offers impressive bang for your buck when it comes to the CX 300S. Built like a tank and sounding surprisingly good for such a budget-minded earphone, the CX 300S out-classes many of its would-be competitors. Functional but beautiful, it’s the perfect in-ear listening solution for anyone who wants to hear everything and look good doing it."
Get a great deal on the Koss Porta Pro or the Sennheiser CX300S
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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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.
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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.
Jason Lew
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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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