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Sony WI-XB400, Wireless Xtra Bass In-ear headphones coming soon

Sony wixb400 wi-xb400

It appears Sony is not quite finished with their wireless headphone lineup just yet.  Today on the FCC, the WI-XB400 made an appearance, and judging from the model name, we are looking at a mid level pair of wireless in-ear headphones with Sony's Xtra Bass.

Very little information is provided in the FCC documents, apart from the fact it uses Bluetooth, no version number is provided in the paperwork.  The image of the label only shows part of the cable, a flat design, and the main pod (if you wish to call it that), which appears to house the battery, usb port and rest of the electronics.  Unknown if the pod will be doubled up like in the new WI-C200/C310 line or single like in the WI-SP600N.  Hopefully Sony will follow the WI-C200/C310 path and offer USB type-C.

There is some good news, the rest of the documents become available on May 26 2019, so if nothing appears on Sony's website before then, I will post the photos and manuals on here. But I suspect we are again looking at a launch like the WI-C200/C310 had, one day just appearing on the Sony site.

As for how this new headset fits into the new lineup, perhaps we are looking at a successor to the MDR-XB50BS headphones.  It has been a while since Sony released any wireless in-ear XB headphones, with the last release was back in Fall of 2016 during IFA, so almost 3 years ago.  Most of those in-ear XB headsets used the Qualcomm's CSR8675, which offers plenty of features, like active NC and aptX, but it maxes out at Bluetooth 4.2.  Of course nothing wrong with using Bluetooth 4.2 but when you have a small headset with limited battery size, offering Bluetooth 5.0 and a newer BT chip can increase battery life.  The WI-C200/C310 jumped from 8hr to 15hrs, so a significant increase.  The MDR-XB50BS offered up to 8.5 hours, so pretty decent for a 3 year old device, so anything more than this would be great.

If Sony moves this new WI-XB400 to the new Realtek audio chip, then we would be looking at Bluetooth 5.0 and usb type-C support.  We will know once the documents are revealed, assuming the photos provide the BT chip clearly enough.

While there was no testing of NFC spectrum, this does not mean NFC will not be offered.  The WI-C600N offers NFC, and this was not testing in the FCC documents, so there is a still a a chance we will see NFC.

So expect the next post about these headphones to be either the FCC documents and photos or news of them appearing on Sony's website.

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