Sennheiser MM 400-X vs Sony NWZ WH505-B – Specs, Price & Comparison (2026)

- CD quality audio â€“Featuring the apt-XÂ® codec, the headsets can connect wirelessly to any BluetoothÂ® apt-XÂ® enabled devices, such as the new Apple computers and selected Creative and Samsung music products - Wireless freedom â€“ BluetoothÂ® 2.1 guarantees hands-free convenience without wires and the advanced A2DP profile for Stereo BluetoothÂ® delivers optimized hi-fi stereo sound - Invisible microphone â€“ with high-performance sound quality for clear conversations - Direct cable option â€“ for use on airplanes, with an airline adapter included - Easy headset controls â€“ in one intuitive cluster - Sennheiser sound quality â€“ hi-fi headphone drivers ensure superior dynamic range, detail and excellent bass - Wearing comfort â€“ padded ear-cushions provide an excellent soft fit, even on long trips - Easy-2-GO â€“ the headset folds into a compact bundle for travel and storage, while the headband is metal-reinforced for durability - Flexible â€“ replace the battery with a s

- WALKMAN Series - Built-in Rechargeable lithium-ion Battery 3.7 V - Storage : 16 GB - Playback Capacity : Approx. 20 hours - Quick charge - Approx. 3 minutes charge enables up to approx. 60 minutes playback. - Operating Temperature : 5 Â°C to 35 Â°C (41 ÂºF to 95 ÂºF) - USB microB connector - Hi-Speed USB (USB 2.0 compliant)

Key Differences

Sennheiser MM 400-X and Sony NWZ WH505-B are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. There is a noticeable difference in weight (105 g vs 313 g), which may affect comfort during extended use. 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. The frequency response differs (15 Hz - 22000 Hz vs 5 - 25,000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Impedance levels vary (32 Ohms vs 40 ohm), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity.

Verdict: Both headphones offer strong performance, and the right choice depends on your priorities such as battery life, comfort, and noise cancellation.

Top Differences

Driver Size: NA vs 40 mm
Weight: 105 g vs 313 g
Impedance: 32 Ohms vs 40 ohm

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Key Differences

Top Differences