Sennheiser CX 400BT True Wireless vs Soundcore P40i – Specs, Price & Comparison (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€‹.

Long, Powerful Batteries Life : Enjoy 12 hours of battery life on a single charge with a case that extends it to 60 hours. That's long enough to last weeks, even a month. Thumping Beats : Soundcore P40i wireless earbuds feature 11mm composite drivers for an intensive audio experience, enhanced with BassUpâ„¢ technology for real-time intense bass. Superior Call Quality : Soundcore P40i noise cancelling earbuds enhanced by 6 mics and an AI algorithm allow you to enjoy clear communication. Whether on a call or via video chat, your voice is transmitted with clarity and strength. Smart Noise Cancelling : Soundcore P40i noise cancelling earbuds feature adaptive ANC that automatically detects ambient noise and utilizes advanced algorithms to achieve effective noise cancellation, ensuring peace and tranquillity on the go. 2-In-1 Charging Case & Phone Stand : Soundcore P40i wireless earbuds feature a unique charging case, doubling as a phone stand, allowing you to enjoy shows hands-free. This multi-functional design enhances your video experience when you're on the go.

Key Differences

The driver size differs between the two (7 mm vs 11 mm), which can influence sound depth, bass response, and overall audio clarity. There is a noticeable difference in weight (37 Gm vs 54 GM), which may affect comfort during extended use. Sennheiser CX 400BT True Wireless and Soundcore P40i offer different noise cancellation capabilities (Passive vs Adaptive Active Noise Cancelling), which can impact how effectively they block external noise. Sennheiser CX 400BT True Wireless uses Bluetooth 5.1 while Soundcore P40i supports Bluetooth 5.3, 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. The frequency response differs (5 Hz - 21000 Hz vs 20Hz - 20KHz), which can influence how well the headphones reproduce lows, mids, and highs. If you're comparing Sennheiser CX 400BT True Wireless and Soundcore P40i, both models offer a strong combination of sound performance, comfort, and modern wireless features. Battery life varies between the two (20 Hours vs Playtime With ANC On 10 Hours / 50 Hours. Playtime With ANC Off 12 Hours / 60 Hours.), which affects how long you can use them on a single charge. Impedance levels vary (NA vs 14 Ohms), which can affect compatibility and audio output when used with different devices.

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 Playtime With ANC On 10 Hours / 50 Hours. Playtime With ANC Off 12 Hours / 60 Hours.
Noise Cancelling: Passive vs Adaptive Active Noise Cancelling
Driver Size: 7 mm vs 11 mm
Bluetooth: 5.1 vs 5.3
Weight: 37 Gm vs 54 GM

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Key Differences

Top Differences