The Sennheiser CX400 II precision in-ear headphone is a discontinued Sennheiser classic — engineered for audiophiles who demand high-fidelity sound in a compact, everyday design. Now available as genuine last UK stock at Maibo.
Sound
Precision Bass & Crisp Highs
Dynamic driver technology delivers exceptional clarity with powerful bass and accurate detail across all frequencies. The Sennheiser CX400 II handles every genre — from deep electronic bass to natural acoustic tones.
Control
Inline Mic & Remote
Built-in single-button remote and microphone lets you control music and take calls without reaching for your phone. Clean and practical — ideal for commuting, working, or on-the-go listening.
Fit
Ergonomic Noise Isolation
Ergonomic in-ear design creates a passive seal that blocks ambient noise naturally. Three silicone eartip sizes (S/M/L) plus a carry pouch included — find your perfect fit for all-day secure wearing comfort.
Technical Specifications
| Driver Type | Dynamic |
| Frequency Response | 17 – 22,000 Hz |
| Impedance | 16 Ohms |
| Sound Pressure Level | 110 dB |
| Cable Length | 1.2 metres |
| Connector | 3.5mm Stereo Jack |
| Microphone | Built-in — Inline Remote & Mic |
Box Contents
Sennheiser CX400 II In-Ear Headphones – Black
3 Pairs of Silicone Eartips (S/M/L)
Carry Pouch
User Manual
Compatible With
All smartphones with 3.5mm headphone jack
MP3 players, tablets, laptops
Windows and macOS devices
Condition
Brand New — Retail Packaging
Warranty
12 Months Seller Warranty
Delivery
4–5 Working Days · Fully Tracked
The Sennheiser CX400 II remains one of the most sought-after discontinued in-ear headphones in the UK. Genuine stock, fast delivery, 12-month warranty — only from Maibo.


















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