Sennheiser's approach, which quietly launched the RS 220 wireless headphones at CES Unveiled in New York City tonight. These cord-free cans pipe analog, coaxial or optical sources from a glossy black base station over a 2.4GHz DSSS connection, which seemed to work fairly well even in the crowded event space -- chock full of hundreds, perhaps even thousands of wireless devices.
A packed noisy environment isn't the ideal location to conduct audio tests, but given the conditions, the RS 220 performed well -- Aerosmith's Love in an Elevator was clear and crisp, with a reasonable amount of bass. The headphones were quite comfortable as well -- the velvet-like cups formed a fairly secure fit without putting too much pressure on our ears, as you might expect given the sky-high price tag. They're rated for a distance of up to 300 feet, though the connection dropped at just over 50 feet during our test tonight -- you'll likely see a better range outdoors, however. Jump past the break for a video walkthrough and the PR from Sennheiser.