Sennheiser PX 100-II vs Koss SB40 – Detailed Specs Comparison (2026)

- Open design for natural sound reproduction - Single-sided cable for convenient handling - Steel-reinforced headband for high durability - Fold and flip: registered design allows the ear cups to be turned 90Â° and the headphones folded towards the headband (headphones will lock in open and closed positions) - Convenient carrying case included - Optimised for MP3, iPod, iPhone (iPod and iPhone are trademarks of Apple Inc. registered in the U.S. and other countries) and portable media players - 2 year warranty

- Noise cancelling microphone - Full range of sound brings games to life - Microphone eliminates excessive background noise for greater ease of use with PC voice applications, such as speech recognition - Soft leatherette ear cushions envelop ears for long-lasting comfort and maximum isolation without excess pressure - Adjustable headband fits most head sizes - Independent 3.5mm plugs for easy headphone and microphone connection - Covered under the Koss Stereo phones Limited Lifetime Warranty

Key Differences

The driver size differs between the two (40 mm vs NA), which can influence sound depth, bass response, and overall audio clarity. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. From a usability standpoint, both models provide a reliable and premium headphone experience. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. There is a noticeable difference in weight (74 g vs NA), which may affect comfort during extended use. The frequency response differs (15 Hz - 27000 Hz vs 20 Hz - 20000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (32 Ohms vs 120 Ohms), which can affect compatibility and audio output when used with different devices. If you're comparing Sennheiser PX 100-II and Koss SB40, both models offer a strong combination of sound performance, comfort, and modern wireless features.

Verdict: Choosing between Sennheiser PX 100-II and Koss SB40 depends on whether you value better sound, longer battery life, or enhanced features.

Top Differences

Driver Size: 40 mm vs NA
Weight: 74 g vs NA
Impedance: 32 Ohms vs 120 Ohms

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Key Differences

Top Differences