Sennheiser PXC 550-II vs Sony WH-1000XM4 – Specs, Price & Comparison (2026)

Smart Pause Autopilot. First Class Call Quality. The Sound of Smart Travel. Your Personal Travel Assistant. Long Lasting Comfort, One Charge Travel One touch access to voice assistant: with the touch of a single button you have access to your AI helper: Siri, hey google and Alexa. Smart pause (activated via the app) auto on and off: swivel the ear cups to turn off, sensors detect when you wear the headphone and play or pause music. Touch control: a touch pad on the right ear cup provides vol, play, stop, pause and track skipping control, touching the ear cup allows you to take an incoming call. Exceptional battery performance up to 30 hours: the pxc 550-ii wireless delivers up to 30 hours of battery life, you can travel from London to Hong Kong and back with just one charge. Superior sound quality and active noise cancellation: the pxc 550-ii delivers Sennheiser .legendary sound quality, active noise cancellation reduces the ambient noise around you and can be adjusted.

NFC: Yes Quick Attention: Yes Clearer hands-free calling . Ambient Sound Mode: Yes Optimizing noise cancelling. Noise Cancellation Switch: Yes. Be smarter with Voice Assistant. All day power and quick charging. Volume Control Touch Sensor: Yes. Wireless freedom, premium sound. Gold-plated L-shaped Stereo Mini Plug. Atmospheric Pressure Optimization: Yes. The technology behind the noise cancellation. Real-time restoration of all your compressed files. Adaptive Sound Control automatically adjusts to your location and behavior. Voice assistant: Alexa, Google Assistant & Siri enabled (In-built) for voice access to music, information and more. Activate with a simple touch.

Key Differences

Both models support modern Bluetooth connectivity, ensuring stable wireless performance with compatible devices. Battery life varies between the two (30 Hours vs 30 Hours NC ON , 38 Hours NC OFF), which affects how long you can use them on a single charge. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. There is a noticeable difference in weight (227 gm vs 254 GM), which may affect comfort during extended use. Impedance levels vary (490 ohm vs 16 Ohms), which can affect compatibility and audio output when used with different devices. The driver size differs between the two (32 mm vs 40 mm), which can influence sound depth, bass response, and overall audio clarity. Sennheiser PXC 550-II and Sony WH-1000XM4 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. The frequency response differs (17 Hz - 23000 Hz vs 4Hz - 40KHz), which can influence how well the headphones reproduce lows, mids, and highs. Sennheiser PXC 550-II and Sony WH-1000XM4 offer different noise cancellation capabilities (Active / Passive vs Active Noise Cancelling), which can impact how effectively they block external noise.

Verdict: Both models are competitive, and your decision should be based on your usage needs and preferred features.

Top Differences

Driver Size: 32 mm vs 40 mm
Weight: 227 gm vs 254 GM
Impedance: 490 ohm vs 16 Ohms

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Key Differences

Top Differences