http://www.sonyericsson.com/cws/prod.../overview/w980
"Enjoy the best-in-class music reproduction quality as demonstrated in tests conducted by TESTfactory's renowned lab experts.
*TESTfactory results, July 2008."

Sony Ericsson - Press Release Overview
"The W902 features the same superior sound quality as the W980, about to launch shortly, which was rated ”best audio experience” this month, in a trial conducted in Germany by TESTfactory**."