Sennheiser CX 400BT True Wireless vs JBL Quantum TWS AIR – Which Headphones Are Better? (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€‹.

IPX4 Water and dust resistant. Up To 24 hours of music playback. Crystal clear voice with beamforming microphones. 6 mics and integrated beamforming technology ensure your voice is always heard, whether giving commands or chatting with friends. Experience low latency wireless connection with the included USB-C dongle for compatible devices. JBL Quantum TWS earbuds work seamlessly with Bluetooth enabled devices like smartphones and tablets. JBL Quantum Surround : Feel like you re stepping inside the game with JBL Quantum Surround* for immersive and accurate sound all around you. *JBL Quantum Surround is only available on PC in combination with JBL Quantum Engine software. Check the connectivity guide for compatibility. Stay connected with Fast Pair and JBL Dual Source. Easily switch between 2.4GHz lossless wireless and Bluetooth for incoming calls without interrupting your gaming; Stay focused in the game with JBL's True Adaptive Noise Cancelling, or stay aware of your surroundings with Ambient Aware.

Key Differences

There is a noticeable difference in weight (37 Gm vs 44 GM), which may affect comfort during extended use. The driver size differs between the two (7 mm vs 6.8 mm), which can influence sound depth, bass response, and overall audio clarity. Impedance levels vary (NA vs 16 Ohms), which can affect compatibility and audio output when used with different devices. Sennheiser CX 400BT True Wireless and JBL Quantum TWS AIR offer different noise cancellation capabilities (Passive vs Active Noise Cancelling), which can impact how effectively they block external noise. Battery life varies between the two (20 Hours vs 24 Hours), which affects how long you can use them on a single charge. Sennheiser CX 400BT True Wireless and JBL Quantum TWS AIR are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features. In general, both options are suitable for everyday use including music, calls, travel, and work-from-home scenarios. Sennheiser CX 400BT True Wireless uses Bluetooth 5.1 while JBL Quantum TWS AIR supports Bluetooth 5.2, which can impact connectivity stability and efficiency. The frequency response differs (5 Hz - 21000 Hz vs 20 Hz - 20KHz), which can influence how well the headphones reproduce lows, mids, and highs.

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: 20 Hours vs 24 Hours
Noise Cancelling: Passive vs Active Noise Cancelling
Driver Size: 7 mm vs 6.8 mm
Bluetooth: 5.1 vs 5.2
Weight: 37 Gm vs 44 GM

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Key Differences

Top Differences