The 'in-ear experts' at Westone are currently putting the finishing touches on its latest and greatest earphone which is known as the Westone 4 and features four balanced armature drivers, and the True-Fit technology enabling superior ergonomics and comfort.

The new earphones have a frequency response of 10 Hz -18 kHz, an impedance of 31 Ohms, a sensitivity of 118 dB SPL/mW, is bundled with 'premium comfort' tips, a travel case and a cleaning tool, and is set to become available in Q1 2011 priced at $449.


Source: Here