MWC: Sennheiser MM 450-X and 550-X wireless headphones add aptX Bluetooth

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The two flagship Sennheiser wireless headphone models now come with the superior aptX Bluetooth codec

Sennheiser MM 550-X

Sennheiser has added aptX Bluetooth capability to its flagship wireless range with the launch of the new MM 450-X and MM 550-X headphones.

The aptX audio codec allows for higher quality wireless music streaming compared to standard Bluetooth thanks to better compression.

Both the MM 450-X and MM 550-X feature Sennheiser's NoiseGard 2.0 active noise-cancelling technology, plus TalkThrough for one-touch activation of the external microphone.

Also on board is SRS WOW HD sound processing technology. The bluetooth headphones can also be folded-up for added portability.

There are also MM 400-X and MM 500-X Bluetooth headphones, which also offer aptX Bluetooth playback but don't have active noise-cancelling technology.

The Sennheiser MM 450-X and MM 550-X are due out worldwide from March.

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Joe Cox
Joe Cox
Content Director

Joe is the Content Director for What Hi-Fi? and Future’s Product Testing, having previously been the Global Editor-in-Chief of What Hi-Fi?. He has worked on What Hi-Fi? across the print magazine and website for almost 20 years, writing news, reviews and features on everything from turntables to TVs, headphones to hi-fi separates. He has covered product launch events across the world, from Apple to Technics, Sony and Samsung; reported from CES, the Bristol Show, and Munich High End for many years; and written for sites such as the BBC, Stuff, and the Guardian. In his spare time, he enjoys expanding his vinyl collection and cycling (not at the same time).