Sennheiser CX 400BT True Wireless vs Sony WF-XB700 – Key Differences & Best Choice (2026)

Audio quality is our top priority: Experience great sound with a 7 mm dynamic driver and a wide range of Bluetooth codec support. Sennheiser uses decades of expertise to drive the world of audio technology forward with every product - for new, unique sound experiences. Full digital control with our app: Our Smart Control app for iOS / Androidâ€‹ allows all of the earphone functionalities to be modified to your personal choice. Personalize to your everyday needs: Fully adaptable controls for music, calls and voice assistantâ€‹ - Built-in audio equalizerâ€‹ adapts the sound to your personal preferences. Enjoy outstanding sound quality no matter your mobile device or your surroundings with our wide range of audio codec support including AAC, aptX, SBC as well as passive Noise Cancelling. Long battery life (20 hours) and comfortable wearing: Get up to 20 hours of music playtime with one charge - The ergonomic designâ€‹ offers optimal comfort and secure fit with 4 ear adapter sizesâ€‹â€‹.

With an IPX4 water resistance rating, splashes and sweat won't stop these headphones, so you can keep on moving to the music. EXTRA BASS is a trademark of Sony Corporation. Truly wireless design with Bluetooth wireless technology. Easy hands-free calling and voice assistant 9-hour long battery life, total 18-hour with charging case. A secure fit with Ergonomic Tri-hold structure. The size of the earbuds can be determined based on the number of dotted lines inside the bottom of the earbuds. The buttons on the headphones lets you play, stop, skip through tracks and adjust the volume. Built-In Mic: Conversation flows freely with easy hands-free calling, thanks to the built-in microphone. Google Assistant / Siri A simple button press connects you to your smartphone's Voice Assistant to get directions play music. Enjoy up to 18 hours of listening ( 9 hrs Earbuds + 9 hrs Carrying Case ), if you're in a hurry, 10 minutes' quick charging gives you up to 60 minutes of music playback.

The driver size differs between the two (12 mm vs 7 mm), which can influence sound depth, bass response, and overall audio clarity. There is a noticeable difference in weight (46 gm vs 37 Gm), which may affect comfort during extended use. Sony WF-XB700 uses Bluetooth 5.0 while Sennheiser CX 400BT True Wireless supports Bluetooth 5.1, which can impact connectivity stability and efficiency. Overall, both headphones are feature-rich and cater to users looking for a combination of sound quality, comfort, and wireless convenience. Battery life varies between the two (9 Hours vs 20 Hours), which affects how long you can use them on a single charge. Sony WF-XB700 and Sennheiser CX 400BT True Wireless are premium wireless headphones designed to deliver high-quality sound along with advanced features like noise cancellation and long battery life. The frequency response differs (20 Hz-20,000 Hz vs 5 Hz - 21000 Hz), which can influence how well the headphones reproduce lows, mids, and highs. Sony WF-XB700 and Sennheiser CX 400BT True Wireless offer different noise cancellation capabilities (NA vs Passive), which can impact how effectively they block external noise.

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

Top Differences

Battery Life: 9 Hours vs 20 Hours
Noise Cancelling: NA vs Passive
Driver Size: 12 mm vs 7 mm
Bluetooth: 5.0 vs 5.1
Weight: 46 gm vs 37 Gm

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Top Differences