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While it may look a little bulky, the magnetic attachment weighs just 90 grams (around 3 oz), which doesn't add a whole lot of weight to a phone. However, it's not limited to living on the back of ...

The planar magnetic speaker measures 70 x 105mm and uses Audeze’s patented Fluxor magnets which are highly efficient. A Uniforce diaphragm or voice coil produces distortion-free sound.