Sennheiser CX 400BT True Wireless Earphones Review

Sennheiser launched the Momentum True Wireless 2 earphones earlier this yr, which, whereas wonderful with regards to sound high quality and options, are undoubtedly on the costly aspect at Rs. 24,990. An enormous cause for the excessive worth is energetic noise cancellation; whereas this function does contribute to the excellent general expertise, it additionally places the earphones out of attain for a lot of consumers. Sennheiser’s newest pair of true wi-fi earphones, the CX 400BT, is positioned to deal with that very drawback.

Priced at Rs 16,990, the Sennheiser CX 400BT comes with most of what makes the Momentum True Wi-fi 2 so nice, minus one huge function – energetic noise cancellation. This can be a true wi-fi headset geared toward purists who search for good sound above all the things else. It helps the aptX Bluetooth codec and has Sennheiser’s signature tuning. Is that this now one of the best pair of true wi-fi earphones for below Rs. 20,000? Discover out in our assessment.

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Though massive and odd-looking within the ears, the Sennheiser CX 400BT is a cushty true wi-fi headset

Premium construct high quality, however the Sennheiser CX 400BT earphones are massive

Solely the third pair of true wi-fi earphones launched by Sennheiser in India, the CX 400BT is a little more reasonably priced than the premium Momentum True Wireless 2 earphones. The massive distinction right here is the shortage of energetic noise cancellation, however the CX 400BT is a largely related headset in all different methods, together with design, construct high quality, and specs.

The Sennheiser CX 400BT’s earpieces look considerably much like the Momentum True Wi-fi 2 equivalents, with massive strong plastic casings and a big Sennheiser emblem on the outer aspect of every, which doubles up as a contact management panel. The earpieces are fairly massive, and caught out of my ears significantly; whereas this did not have an effect on match and luxury an excessive amount of when utilizing the best ear suggestions, it undoubtedly appeared a bit odd. Additionally price mentioning is that there is no such thing as a official water resistance ranking on the Sennheiser CX 400BT, which is sort of disappointing for the value.

Contact controls on the Sennheiser CX 400BT are fairly straightforward to make use of, and canopy the entire core features, together with playback, name dealing with, quantity, and voice assistant entry. You’ll be able to customise these controls by means of the Sennheiser Smart Control app, in addition to modify equaliser settings and replace the firmware of the headset. Though fundamental and probably not wanted for a lot past the preliminary setup, the app’s potential to customize the contact controls might come in useful.

The charging case of the Sennheiser CX 400BT is not too fancy, but it surely is not too fundamental both. It has an peculiar plastic end that matches the earpieces, and a magnetic lid that retains it securely shut. There is a USB Kind-C port for charging. This case is extra useful than fashionable, however that is not a foul factor. It is not too massive, and match fairly simply in my pocket. Every earbud weighs 6g, whereas the case weighs an affordable 37g.

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Qualcomm aptX help makes these among the many greatest sounding true wi-fi earphones you should buy

For connectivity, the Sennheiser CX 400BT makes use of Bluetooth 5.1, with help for the SBC, AAC, and Qualcomm aptX Bluetooth codecs. The earphones use 7mm dynamic drivers and have a frequency response vary of 5-21,000Hz; all of those specs match these of the Momentum True Wi-fi 2 earphones, with the plain exception of energetic noise cancellation.

The earphones ran for round six hours per cost at average to excessive quantity ranges, with the charging case offering one other two full costs to the earpieces, for a complete battery lifetime of round 18 hours per cost cycle. Though the variety of further costs you may get from the case is not distinctive, the battery lifetime of the earpieces is fairly good in comparison with different choices on this worth phase.

Nice sound high quality on the Sennheiser CX 400BT

I’ve nearly all the time discovered that superior Bluetooth codec help goes hand-in-hand with good sound high quality, and the Sennheiser CX 400BT helps that inference. The Qualcomm aptX codec makes a noticeable distinction to sound high quality, and the Sennheiser CX 400BT sounded nice when used with an Android smartphone that was capable of activate the codec. Sound high quality was largely on par with that of the Sennheiser Momentum True Wi-fi 2, which is my present high decide for musicality amongst true wi-fi earphones.

I used the Sennheiser CX 400BT with an Android smartphone for a lot of this assessment, but in addition examined it with my MacBook Air and an iPad mini for reference. Though I have a tendency to make use of Spotify for on a regular basis listening, I discovered myself favouring Tidal’s high-resolution streaming whereas utilizing the Sennheiser CX 400BT, due to the mix of excellent driver tuning and technical functionality.

Though the CX 400BT sounded nice with any form of music and in any respect volumes, utilizing high-resolution tracks and turning the amount as much as round 90 % introduced out the best possible in these earphones. Listening to Bruno Mars’ Chunky and Ain’t No Mountain Excessive Sufficient by Marvin Gaye on Tidal Masters was an extremely fulfilling expertise, with the earphones bringing out oodles of element within the tracks. Even the faintest parts within the beat of Chunky felt actual and current, whereas Gaye’s voice sounded clear and filled with character.

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Battery life is respectable, with round six hours of listening per cost on the earpieces

Just like the Momentum True Wi-fi 2, the Sennheiser CX 400BT’s sonic signature undoubtedly has some flavour to it, and is not as balanced or flat as what you’d get with another choices such because the Lypertek Tevi. As an alternative, you get punchy lows that actually drive up the vitality degree, all whereas remaining refined and managed sufficient to not sound too boomy.

Whereas the aptX Bluetooth codec helped carry out element and refinement in high-resolution music, this did not essentially imply that compressed audio sounded poor. The Sennheiser CX 400BT sounded slightly extra aggressive and forceful with Spotify and YouTube Music, however by no means disagreeable. The earphones’ versatile nature additionally meant that just about any style sounded good, though the bias in direction of the lows made for extra entertaining sound with fast-paced digital audio tracks.

Listening to Inside My Head (Aeroplane Remix) by Riton, the sound was participating and immersive, with the low-end for me being felt greater than heard. The mid-range and highs had been additionally clear and fairly pure, however the general sonic signature was closely outlined by the low-end drive. Though a variety of listeners may desire a extra natural-sounding pair of earphones, this sprint of flavour and character is what made the Sennheiser CX 400BT all of the extra endearing to me.

The earphones did additionally work nicely sufficient for basic audio, together with watching movies and voice calls. Premium choices from Sony, Apple, and Jabra are a bit higher for voice calls, however the Sennheiser CX 400BT does an affordable job, with acceptable sound on each ends of the decision. The shortage of options reminiscent of energetic or environmental noise cancellation are the differentiating issue right here, with the Sennheiser CX 400BT being extra targeted on music.


Sennheiser’s presence within the premium true wi-fi area has thus far been restricted to the flagship Momentum True Wi-fi vary, so the CX 400BT comes as a welcome addition to the sub-Rs. 20,000 worth phase. With largely the identical efficiency because the Momentum True Wi-fi 2 with regards to sound high quality and battery life, it is a worthwhile headset to contemplate, assuming you do not want energetic noise cancellation.

Probably the most musical of all of the true wi-fi earphones I’ve reviewed on this worth phase, the Sennheiser CX 400BT is right for consumers who worth sound high quality and efficiency with music above all else. If you would like energetic noise cancellation at round this worth, choices such because the Jabra Elite 75t and Sony WF-1000XM3 are additionally price contemplating.

Worth: Rs. 16,990

That are one of the best actually wi-fi earphones below Rs. 10,000? We mentioned this on Orbital, our weekly know-how podcast, which you’ll subscribe to by way of Apple Podcasts, Google Podcasts, or RSS, download the episode, or simply hit the play button beneath.

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