Sennheiser CX 400BT True Wireless vs Philips TAT4506 – Full Comparison & Verdict (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€‹.

Secure, Comfortable In-Ear Fit : You get real comfort thanks to soft, interchangeable silicone ear-tip covers. The ear-tip covers securely insert into your ear canal, creating a perfect seal that diminishes external noise. IPX4 Splash & Sweat Resistant : With an IPX4 rating, these true wireless headphones are resistant to splashes from any direction. They won't mind a little sweat, and you don't need to worry about getting caught out in the rain. Touch Controls. Built-In Mic. Easy Pairing : Tap the earbud to pause your playlist, take calls, and wake your phone's voice assistant. The headphones are ready to pair in an instant. Once paired, they reconnect with your phone as soon as you open the charging case. Make Calls Using A Single Earbud. Mono Mode : Taking a lot of calls? You can double your talk time by using one earbud while the other one charges. The mic is automatically assigned to the earbud you're using, and you simply swap over when your current earbud is running low on battery. Always Focused On Your Music. Active Noise Canceling : These headphones filter out the noise you don't want to hear, so you're free to be with the tunes you love. Awareness Mode means you can let the world back in when you need to, and the music pauses if you take either earbud out of your ear. Portable USB-C Charging Case. 18 Hours Extra Play Time : Take your music anywhere. You get great sound from the 6 mm drivers, and 6 hours play time from a single charge. A fully charged case adds another 18 hours. For a quick boost, pop your headphones in the case for 15 minutes and get an extra hour.

Battery life varies between the two (20 Hours vs 6 + 18 Hours), which affects how long you can use them on a single charge. Sennheiser CX 400BT True Wireless uses Bluetooth 5.1 while Philips TAT4506 supports Bluetooth 5.0, which can impact connectivity stability and efficiency. The frequency response differs (5 Hz - 21000 Hz vs 20Hz - 20KHz), which can influence how well the headphones reproduce lows, mids, and highs. Impedance levels vary (NA vs 16 Ohms), which can affect compatibility and audio output when used with different devices. 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 (37 Gm vs 55 GM), which may affect comfort during extended use. Sennheiser CX 400BT True Wireless and Philips TAT4506 offer different noise cancellation capabilities (Passive vs Hybrid Active Noise Cancelling), which can impact how effectively they block external noise. The driver size differs between the two (7 mm vs 10 mm), which can influence sound depth, bass response, and overall audio clarity. Sennheiser CX 400BT True Wireless and Philips TAT4506 are well-known options in the wireless headphone segment, offering a balance of audio quality, battery performance, and smart features.

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 6 + 18 Hours
Noise Cancelling: Passive vs Hybrid Active Noise Cancelling
Driver Size: 7 mm vs 10 mm
Bluetooth: 5.1 vs 5.0
Weight: 37 Gm vs 55 GM

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Top Differences