Sennheiser CX 400BT True Wireless Earphones Review

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Sennheiser launched the Momentum True Wi-fi 2 earphones earlier this 12 months, which, whereas glorious with regards to sound high quality and options, are positively on the costly facet at Rs. 24,990. A giant purpose for the excessive value is energetic noise cancellation; whereas this function does contribute to the very good total expertise, it additionally places the earphones out of attain for a lot of patrons. 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 large function – energetic noise cancellation. This can be a true wi-fi headset geared toward purists who search for good sound above every part else. It helps the aptX Bluetooth codec and has Sennheiser’s signature tuning. Is that this now the perfect pair of true wi-fi earphones for underneath Rs. 20,000? Discover out in our assessment.

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 inexpensive than the premium Momentum True Wi-fi 2 earphones. The massive distinction right here is the shortage of energetic noise cancellation, however the CX 400BT is a largely comparable 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 stable plastic casings and a big Sennheiser brand on the outer facet 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 fitting ear suggestions, it positively seemed a bit odd. Additionally value mentioning is that there is no such thing as a official water resistance ranking on the Sennheiser CX 400BT, which is kind of disappointing for the worth.

Contact controls on the Sennheiser CX 400BT are fairly straightforward to make use of, and canopy all the core features, together with playback, name dealing with, quantity, and voice assistant entry. You’ll be able to customise these controls via the Sennheiser Smart Control app, in addition to alter 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 skill to customize the contact controls might turn out to be useful.

The charging case of the Sennheiser CX 400BT is not too fancy, however it is not too fundamental both. It has an strange plastic end that matches the earpieces, and a magnetic lid that retains it securely shut. There is a USB Sort-C port for charging. This case is extra practical than trendy, however that is not a nasty 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 assist 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 assist 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 apparent 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 extra costs you will get from the case is not distinctive, the battery lifetime of the earpieces is fairly good in comparison with different choices on this value phase.

Nice sound high quality on the Sennheiser CX 400BT

I’ve virtually at all times discovered that superior Bluetooth codec assist 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 in a position to activate the codec. Sound high quality was largely on par with that of the Sennheiser Momentum True Wi-fi 2, which is my present prime choose 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, because of 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 pleasurable expertise, with the earphones bringing out oodles of element within the tracks. Even the faintest components within the beat of Chunky felt actual and current, whereas Gaye’s voice sounded clear and stuffed 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 positively 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 a substitute, you get punchy lows that actually drive up the power degree, all whereas remaining refined and managed sufficient to not sound too boomy.

Whereas the aptX Bluetooth codec helped deliver out element and refinement in high-resolution music, this did not essentially imply that compressed audio sounded poor. The Sennheiser CX 400BT sounded a little bit 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 the 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 partaking and immersive, with the low-end for me being felt greater than heard. The mid-range and highs have been additionally clear and fairly pure, however the total sonic signature was closely outlined by the low-end drive. Though a number of listeners would possibly want 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 common 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 comparable to energetic or environmental noise cancellation are the differentiating issue right here, with the Sennheiser CX 400BT being extra centered on music.


Sennheiser’s presence within the premium true wi-fi area has to date 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 value 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 think about, assuming you do not want energetic noise cancellation.

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

Value: Rs. 16,990

That are the perfect really wi-fi earphones underneath Rs. 10,000? We mentioned this on Orbital, our weekly know-how podcast, which you’ll subscribe to through Apple Podcasts, Google Podcasts, or RSS, download the episode, or simply hit the play button under.

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