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Sennheiser True Wireless Headphones CX 400BT, Black

4.2 out of 5 stars 2,404 ratings

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Colour: Black
Black
Updated other options based on this selection
Style: 2020
2020
Updated other options based on this selection
Brand Sennheiser
Colour Black
Connector Type Wireless
Model Name CX 400BT True Wireless
Form factor In Ear

About this item

  • 7m dynamic driver powered with Sennheiser audio expertise
  • Up to 7 hours play back with up to 20 hours available with on the go charging via the case
  • Customizable touch controls; Full control of music calls and voice assistant
  • Ergonomic design optimal comfort and secure fit with 4 ear adaptor sizes
  • Built in equalizer; Personalize the audio experience

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Product Information

Colour:Black  |  Style:2020

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Product description

Colour:Black  |  Style:2020

Superior sound. Tailored to you. Your day to day may change but your enjoyment of superior sound will not. Powered by Sennheiser is leading audio technology, the new CX 400BT True Wireless gives you total control over an exceptional sound experience. With intuitive customizable controls, long lasting battery life and a design made for all day comfort, they are the ideal, uncompromised choice for people that are passionate about great sound.


From the manufacturer

CX 400BT True Wireless MOMENTUM True Wireless 2
CX 400BT True Wireless MOMENTUM True Wireless 2
Colour Variants Black & White Black & White
Battery Life 7h + 13h (earbud + charging case) 7h + 21h (earbud + charging case)
Customizable Controls
Call Function
Active Noise Cancellation
Voice Assistant Access
Internal EQ/Custom Presets
Transparent Hearing
Smart Pause
Splash Resistant (IPX4)

Customer Questions & Answers

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4.2 out of 5 stars
4.2 out of 5
2,404 global ratings

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Top reviews from Australia

Reviewed in Australia on 29 April 2021
Colour: WhiteStyle: 2020Verified Purchase
4 people found this helpful
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Reviewed in Australia on 6 August 2021
Colour: WhiteStyle: 2020Verified Purchase
One person found this helpful
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Reviewed in Australia on 3 August 2021
Colour: BlackStyle: 2020Verified Purchase
Reviewed in Australia on 6 August 2021
Colour: WhiteStyle: 2021Verified Purchase
Reviewed in Australia on 7 August 2021
Colour: BlackStyle: 2020Verified Purchase
Reviewed in Australia on 26 August 2021
Colour: BlackStyle: 2020Verified Purchase
Reviewed in Australia on 29 May 2021
Colour: BlackStyle: 2020Verified Purchase
One person found this helpful
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Reviewed in Australia on 2 April 2021
Colour: BlackStyle: 2020Verified Purchase
One person found this helpful
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Top reviews from other countries

Martin Majewski
3.0 out of 5 stars Nicht für den Preis
Reviewed in Germany on 2 September 2020
Colour: BlackStyle: 2020Vine Customer Review of Free Product( What's this? )
265 people found this helpful
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john j
3.0 out of 5 stars Great sound , but ,
Reviewed in the United Kingdom on 20 December 2020
Colour: WhiteStyle: 2020Verified Purchase
73 people found this helpful
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Colocolo123
5.0 out of 5 stars 買って良かった。音質、デザイン、装着感いずれも満足!
Reviewed in Japan on 26 September 2020
Colour: WhiteStyle: 2020Verified Purchase
Customer image
5.0 out of 5 stars 買って良かった。音質、デザイン、装着感いずれも満足!
Reviewed in Japan on 26 September 2020
ワイヤレスで音質が良いイヤホンが欲しいと思っていました。
ゼンハイザーのMOMENTUM True Wireless 2は高価でためらっていたところ、音質を落とさない中級機が出るということで思わず予約して購入しました。

良かった点
・音質: 
 とても良いです。クリアで聴きやすい音質です。ボーカルもクリアですし、アコースティックギターの響きもきれいです。
これまでソニーのワイヤレスヘッドホンWH-1000XM3を使っていました。
WH-1000XM3はノイズキャンセリング(NC)機能の評価が高いのですが、密閉型でNCを使うと鼓膜が圧迫されるような感じがしてすぐに疲れてしまいます。
これはNC機能がありませんが、その分圧迫感がなく適度に周囲音も入るので聴き疲れしません。
ただ、さすがに低音はあまり強くないです。
・装着感:
 耳にしっかりフィットします。Appleのイヤホンははずれて落ちそうでとても気になりますが、これは安心してつけていられます。
イヤーアダプターが柔らかく、耳を強く塞いでいる感じがしないので違和感もあまりありません。
・大きさ:
 イヤホンの大きさはちょうど良いです。ケースは思っていた以上に小さいです。
5cm(W)X3cm(D)X4cm(H)くらい。どこにでも入れて持ち運べます。これで20時間分も充電しておけるなら十分です。

ちょっと惜しい点
・ケーブル:
 充電用のUSBケーブルはケースに入りません。ケーブルだけ別に持ち運ぶのは面倒なのでケースに入るようにして欲しかった。
・スマホアプリ:
 音質の制御があまりできません。できるのは低/中/高域の3ケ所の音量だけでおまけ程度。
ソニーのような細かい帯域のレベル調整や音場選択はできません。
それだけストレートの音質に自信があるということか。
でも、電話の機能より音質の制御機能を充実させて欲しかった。
・音量レベル:
 基準の音量レベルが低いです。iPhoneにつなげて音楽を聴く場合、普通のイヤホンで聴く場合は半分くらいの音量レベルで聴いているのですが、CX400BTでは目一杯上げてちょうど良いくらいです。      
目一杯音量を上げても、イヤホンを切断すると元の音量には戻るようです。
でも、もう少し基準の音量を上げて欲しいところです。
★訂正→使っているうちに十分な音量レベルになりました。充電時間かエージングが短かったのか? 今は問題ありません。
・タッチ機能:
 イヤホンにタッチすることで電話の応答、拒否などができます。
ただ、電話してない時ちょっと触っただけでSiriが応答します。電話の応答や切断もできますが、個人的には音楽再生重視なのでいずれ設定をカスタマイズしようと思います。

トータルとして、ワイヤレスでも音質が良く、聴き疲れしません。デザインもシンプルで気に入ってます。
新幹線の移動などがより楽しくなりそうです。買って良かったです。
------------------------
追記です。
使っているうちに低音もでてくるようになりました。やはりエージングが必要だったのかもしれません。
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143 people found this helpful
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Srikanth Jatla
5.0 out of 5 stars Look No Further.. Sennheisers are the best!
Reviewed in India on 6 June 2021
Colour: BlackStyle: 2020Verified Purchase
Customer image
5.0 out of 5 stars Look No Further.. Sennheisers are the best!
Reviewed in India on 6 June 2021
After a thorough and lengthy research of around four months on mid range and high end earbuds including Noise, Jabra, Sony and Bose, after purchasing, trying and selling all the above (except Bose SoundSport Free as I gifted them to my wife) I settled with Sennheiser CX 400BT.

Before trying the CX 400BT, I was a big fan of Bose sound signature and couldn’t afford Bose QuiteComfort earbuds as they cost around 27k. I waited for a long time to buy them on a discount due to the excellent and highly rated ANC feature, but to no avail. I loved the sound on Bose SoundSport Free, but when I used them while travelling, the quality faded due to lack of noise cancellation. But the buds are very comfortable and when you listen to them in the absence of noise, I felt they were awesome, that is until I tried Sennheisers.

I have read very positive reviews about Sennheisers everywhere and Momentum 2 were the highest rated among ANC earbuds but are also above 20k. I was ready to spend around 12k and so picked CX400BT even though I doubted their performance. It has been nearly one month since I started using them and believe me, the clarity and quality of sound on these is just awesome and no match with the Bose earbuds which are high on bass and slightly muffled compared to these if you listen side by side. No need of ANC if you have these buds, as their passive noise cancellation is almost equal to ANC and leak no noise during travel.

The battery back up is awesome (getting around 20 hours after full charge) and the buds are comfortable in the ear and do not look very big in the ears as claimed by some reviewers. Call quality and connectivity are good. Passive noise cancellation is excellent.

The app supports equaliser, but the neutral profile is the best. Treble may be a little on the higher side for those who like more bass, which may be adjusted by one notch for the best sound quality which is my favourite. I am a bass lover, and these do perform to my liking completely even though you feel them to have less bass compared to other buds such as Bose or Jabra. Jabra elite active 75t were also equally good but the sound signature is not match to Sennheiser. After getting habituated to Sennheiser, I feel that the Bose earbuds do not sound as good. Listen to Sennheisers to believe it.

Only one negative with CX 400BT is their case, which is plasticky and of poor quality. The case gets scratched easily and feels very delicate in hand. I would have felt more happier if the case is of better quality especially as these cost around 12k.

However, I gave these buds five stars and recommend these to anyone who’s looking for best quality of sound at this price range. I’m sure you won’t be disappointed.

Sennheiser CX400BT are the best buds in any price range!! Look no further if you can afford them!
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58 people found this helpful
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Amazon カスタマー
3.0 out of 5 stars 最高の音質?
Reviewed in Japan on 1 October 2020
Colour: BlackStyle: 2020Verified Purchase
126 people found this helpful
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