Yamaha has dipped into in-ear headphones for the first time with the late Friday launch of its EPH line. The EPH-50 is considered the pseudo-audiophile model with 13.6mm (0.53in) drivers, tougher construction and a quarter-inch adapter for home stereos. The EPH-30 is the mainstream entry with 9mm (0.35in) drivers and a more conventional build, and the EPH-20 caters to entry-level listeners with slightly larger drivers (10.7mm or 0.42in) but low-cost sound and five color choices.
