Planar magnetic headphones don't use the magnet-and-coil driver typical to most cans. Instead, they use a fixed but flexible diaphragm that undulates to create sound. RHA is the first company to concentrate this technology into wireless earbuds (the... 
https://ift.tt/2PXImfG support@endlesssupplies.ca (Endless Supplies .Ca) September 01, 2018 at 02:03PM
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