Sennheiser CX 400BT
 | Expecting restock Premium True Wireless in-ear headphones with built-in microphones. They are distinguished by high sound quality, which is ensured by the high-tech design of branded dynamic drivers with neodymium magnets and support for aptX and AAC audio codecs. The latter guarantee flawlessly accurate transmission of digital audio signal compressed without loss of quality by FLAC or Apple Lossless compressors. Due to their low weight (6 g each) and compact size, they do not create any problems during transportation and storage. The manufacturer claims the reproduction of an extended frequency range (from 5 Hz to 21 kHz), high sensitivity and impressively low harmonic distortion. Together, these characteristics make the Sennheiser CX 400BT headphones capable of delivering balanced and highly detailed soun...d suitable for all types of music. Built-in microphones turn them into a solid wireless headset for voice communication in cellular networks. The equalizer in the Sennheiser Smart Control mobile app lets you fine-tune the sound, while the podcast mode enhances the quality of your spoken word. |
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in-ear, wireless, true wireless, Bluetooth v5.0, AAC, active noise cancellation, waterproof, 20 – 20000 Hz, 16 Ohm, battery: 55 mAh, up to 9 h, with case + 24 h
in-ear, wireless, true wireless, Bluetooth v5.2, AAC, aptX, active noise cancellation, voice assistant, waterproof, 10 – 22000 Hz, battery: 83 mAh, up to 11 h
in-ear, wireless, true wireless, Bluetooth v5.2, AAC, LDAC, active noise cancellation, waterproof, 14 – 48000 Hz, battery: 55 mAh, up to 4.5 h, with case + 22 h
in-ear, wireless, true wireless, Bluetooth v5.3, AAC, LDAC, active noise cancellation, waterproof, 20 – 40000 Hz, battery: up to 7 h, with case + 28 h
in-ear, wireless, true wireless, Bluetooth v5.3, active noise cancellation, voice assistant, waterproof, battery: up to 6 h, with case + 24 hours of calls
in-ear, wireless, true wireless, Bluetooth v5.1, active noise cancellation, 20 – 20000 Hz, 16 Ohm, battery: up to 8 h, with case + 32 h
in-ear, wireless, true wireless, Bluetooth v5.3, AAC, LDAC, active noise cancellation, voice assistant, waterproof, 20 – 40000 Hz, 16 Ohm, battery: 85 mAh, up to 9 h, with case + 36 h
in-ear, wireless, true wireless, Bluetooth v5.4, AAC, aptX, active noise cancellation, voice assistant, waterproof, 5 – 21000 Hz, battery: 75 mAh, up to 7.5 h, with case + 30 h
in-ear, wireless, true wireless, Bluetooth v5.3, AAC, LDAC, active noise cancellation, voice assistant, waterproof, 20 – 40000 Hz, battery: up to 8 h, with case + only LDAC
in-ear, wireless, true wireless, Bluetooth, AAC, active noise cancellation, voice assistant, waterproof, 20 – 20000 Hz, battery: up to 4.5 h, with case + 19.5 h
in-ear, wireless, true wireless, Bluetooth v5.2, aptX, waterproof, 20 – 20000 Hz, battery: up to 7 h, with case + 28 h
in-ear, wireless, true wireless, Bluetooth v5.2, AAC, aptX, active noise cancellation, voice assistant, waterproof, 5 – 21000 Hz, battery: 77 mAh, up to 7 h, with case + 28 h
in-ear, wireless, true wireless, Bluetooth v5.2, aptX, active noise cancellation, voice assistant, waterproof, 20 – 20000 Hz, battery: up to 7 h, with case + 28 h
online переводчик, in-ear, wireless, true wireless, Bluetooth v5.3, active noise cancellation, voice assistant, waterproof, pulse sensor, battery: up to 8 h, with case + 24 h
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Premium True Wireless in-ear headphones with built-in microphones. They are distinguished by high sound quality, which is ensured by the high-tech design of branded dynamic drivers with neodymium magnets and support for aptX and AAC audio codecs. The latter guarantee flawlessly accurate transmission of digital audio signal compressed without loss of quality by FLAC or Apple Lossless compressors.
Due to their low weight (6 g each) and compact size, they do not create any problems during transportation and storage. The manufacturer claims the reproduction of an extended frequency range (from 5 Hz to 21 kHz), high sensitivity and impressively low harmonic distortion. Together, these characteristics make the Sennheiser CX 400BT headphones capable of delivering balanced and highly detailed sound suitable for all types of music. Built-in microphones turn them into a solid wireless headset for voice communication in cellular networks. The equalizer in the Sennheiser Smart Control mobile app lets you fine-tune the sound, while the podcast mode enhances the quality of your spoken word.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Sennheiser 2026 - new arrivals, bestsellers, and the most relevant models Sennheiser.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Sennheiser 2026 - new arrivals, bestsellers, and the most relevant models Sennheiser.
Series Sennheiser CX (in-ear)Compare using chart →
in-ear, wireless, true wireless, Bluetooth v5.2, AAC, aptX, active noise cancellation, waterproof, 5 – 21000 Hz, battery: up to 6 h
in-ear, wireless, true wireless, Bluetooth v5.2, AAC, aptX, waterproof, 5 – 21000 Hz, 16 Ohm, battery: 55 mAh, up to 9 h, with case + 27 h
Model overview based on user reviews
The Sennheiser CX 400BT headphones have received mixed reviews from users. On the positive side, they are noted for their good sound quality. However, several users have reported significant issues with the product's durability and design. One user mentioned that the earbuds fall off easily, especially in crowded areas, and described the model as having serious flaws. Another user experienced repeated malfunctions, with one earbud failing after just two weeks and the other after three months, despite replacements under warranty. These issues have led to dissatisfaction, with some users feeling that the product does not offer good value for money.
Pros
Cons
No merits All...they don’t see the smart, they fall off all the time (especially where it’s crowded)  Makhno: use Sennheiser CX 400BT less than month |
rubbish is rare. After two weeks of use, the left earbud stopped working. Changed under warranty. Three months later, the right one stopped working. Junk made in China. Whoever buys will throw the money in the trash can. Sound good broke twice in 3 months Sergio Borisovich: use Sennheiser CX 400BT few months |
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