Sennheiser has announced its latest high-end range of headphones in the form of the 500 series. These headphones boast EAR (Eargonomic Acoustic Refinement) technology, which sounds quite cute. Aside from word play, the headphones use neodymium magnets and duofol diaphragms, a gold-plated 6.3mm audio jack and a frequency response of 12Hz to 38,500Hz to offer a good sound experience. The 500 Series will include the HD598 which is padded with a compressed cellulose fleece and is capable of 38,500Hz; the HD558 which is built with soft velour ear pads and is capable of 28,000Hz; and finally the HD518 which sports an anthracite finish and can run up to 26,000Hz. Pricing hasn’t been mentioned just yet, but it’s slated to be released in the UK this month, so we’ll find out pretty soon.