Sennheiser announces high-fidelity in-ear headphones at CES. The IE 300 are wired headphones that transport Sennheiser’s famed superior sound in a premium design. What stands out is that the 3.5 mm cable is replaceable. Wired for Exceptional Sound Quality Wired headphones are making a comeback. Audiophiles know that, in terms of audio quality, they’re miles ahead of