JVC has launched its HA-FX300 headphones that are part of its high-end line of in-ear canal headphones. The HA-FX300 uses a range of sound-enhancing technologies courtesy of an aluminum evaporation diaphragm, a new internal dual-metal structure and aluminum housing. Sounds like there’s more than its fair share of aluminum thrown in, giving it more accurate high-frequency detail when compared to conventional cellulose or polymer-based diaphragm designs. Its new Bi-METAL structure ensures vibration and energy loss is minimized or even eliminated, greatly enhancing performance across the frequency range to those with highly sensitive ears. Each purchase comes with a trio of different sized silicon rubber earpieces as well as a pair of memory foam earpieces for a customized fit.Original post by Tapee