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

- 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)

- 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

Key Differences

Sennheiser MM 400-X and Sony NWZ WH505-B are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. 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. Both headphones offer solid battery performance, making them suitable for long listening sessions and travel. Both models feature noise cancellation, helping reduce background noise for a more immersive listening experience. 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. There is a noticeable difference in weight (105 g vs 313 g), which may affect comfort during extended use. The driver size differs between the two (NA vs 40 mm), which can influence sound depth, bass response, and overall audio clarity.

Verdict: Choosing between Sennheiser MM 400-X and Sony NWZ WH505-B depends on whether you value better sound, longer battery life, or enhanced features.

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