SENNHEISER CX 400BT True Wireless

The sound is crisp and clear with a good balance of bass and treble. Vocals are sharp, and bass is punchy but not overwhelming, which makes it great for both music and calls.

⭐⭐⭐⭐⭐ (4.7/5) "Premium sound meets practicality — for audiophiles on the go." After using the CX 400BT True Wireless for over a month, I can confidently say these earbuds deliver exceptional sound quality, even better than many pricier options out there. Sennheiser clearly focused on what matters most — audio performance. 🔊 Sound Quality: 9.5/10 Signature Sennheiser sound — rich bass, detailed mids, and crystal-clear highs. You’ll enjoy every layer in your music: whether it’s vocals, instruments, or subtle background elements. Works great for genres like classical, pop, hip-hop, and EDM. ✅ Customizable EQ in the app is a big plus. 🎤 Call Quality: 8/10 Dual mics deliver clear voice output for Zoom/WhatsApp/normal calls. Indoors = perfect; Outdoors = slightly average in noisy places (no ANC for calls). ⚙️ Controls & Features: Fully customizable touch controls (volume, track, voice assistant, etc.) Pairing is quick and stable with Bluetooth 5.1. No active noise cancellation (ANC), but passive isolation is solid thanks to the ergonomic fit. 🔋 Battery Life: Earbuds: ~7 hours on a full charge With case: Up to 20 hours total Fast charging is okay, but no wireless charging (minor con) 🎧 Comfort & Fit: Lightweight and comfortable even during 2–3 hour sessions. Great for commuting, work-from-home, and light workouts. 📱 Sennheiser Smart Control App: Update firmware Customize EQ Reassign touch gestures Very user-friendly and a big advantage for tweaking the experience to your liking. 🔻 Downsides: Feature Limitation No ANC Not ideal for flights/crowds Bulky case Pocketable but chunky No waterproof rating Not for sweaty gym sessions 🏁 Final Verdict: The CX 400BT is a pure sound-focused TWS. If audio quality is your priority — this is a beast in its price range. Sennheiser nailed the tuning, and it’s a pleasure for everyday music lovers and casual listeners alike. ✅ Best For: Music lovers, audiophiles, WFH professionals ❌ Not For: Gym freaks, people needing ANC Rating: 4.7/5 – Highly Recommended if you want true Sennheiser sound in wireless form.

The CX 400BT True Wireless is a fantastic choice for those who prioritize sound quality and customization over features like ANC or waterproofing. If you’re looking for high-end audio performance at a reasonable price, these earbuds are a great investment

So it is one of the best earbuds I've ever used and its ergonomics comfort sound quality etc are damnn good noise cancellation is also good not activs but the passive is good and the touch feedback is also very good...I suggest u that u can buy it and it wont regret u

He very best earbuds for all activities . Sound quality is best . Build quality is best . Ear fit . Hea so amazing good