One of the final components of Sony's CES 2009 launches includes sweeping changes to its digital audio offerings, starting with its headphones. The MDR-XB series is the company's first to stress bass and contain drivers skewed towards dance and urban music. Three earcup models, the XB300, XB500 and XB700, have drivers between 30mm and 50mm in size and are cushioned for long listening sessions.
