Compare Open-Ear Designs
Compare open-ear and bone-conduction wireless audio by mechanism, fit, awareness limits, and the model details to verify before buying.
Sennheiser CX 400BT True Wireless In-Ear Headphones
Product details
General specs
- Brand: Sennheiser
- Model: CX 400BT
Starting from €157.56
Last price update: 10/7/26
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| Brand | Sennheiser | Sennheiser | Sennheiser | HXSJ | Sennheiser | Sennheiser |
| Model | CX 400BT | CX200TW1 | Momentum True Wireless 4 | Air-S4 | HDB 630 | ACCENTUM True Wireless |
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| Price | €157.56 | €66.84 | €267.49 | €18.10 | €445.85 | €196.15 |
| Seller | Newegg | Newegg | Newegg | Newegg | Newegg | Newegg |
| Update | Oct 17, 2026 | Oct 17, 2026 | Oct 17, 2026 | Oct 17, 2026 | Oct 17, 2026 | Oct 17, 2026 |
| Model Name | CX 400BT | CX200TW1 | Momentum True Wireless 4 | Air-S4 | HDB 630 | ACCENTUM True Wireless |
| Part Number | 508901 | CX200TW1 White | C16101V63=EDA002194301B | 6C-5E4P-A66A | 700263 | |
| Sensitivity | 107 dB SPL (1 kHz / 1 mW) | 110 dB SPL (1 kHz / 0 dBFS) | 105 dB (1 kHz / 0 dBFS) | 107dB S.P.L. at 1KHz | ||
| Product Type | True wireless headphones | True Wireless In-Ear Headphones | Wireless earbuds | true wireless earphones | Wireless over-ear headphones | True wireless earbuds |
| Frequency Response | 5Hz-21KHz | 5Hz-21KHz | 5Hz-21KHz | USB: 6 Hz–40 kHz only when using Line-In or USB (96 kHz), and Bluetooth with aptX adaptive (96 kHz); 6 Hz–22 kHz otherwise | 5Hz-21KHz | |
