Bowers & Wilkins MM-1
Credit: Photograph by Greg Broom

Plug in the 6.7-inch MM-1 via a USB port, and an internal digital-to-analog converter improves the sound. Compared with your com­puter's audio jack, it's like going from FM radio to CD. We liked its wide soundstage and lush midrange. [$500;]

Rating: 8 out of 10