As a test, I downloaded files from HDtracks.com, an online retailer specializing in hi-res audio, plugged a device known as a digital-to-analog converter (DAC) into my computer and listened over earphones.

WSJ: Sonic Truth

All three perform the same basic function -- they let you stream TV from your cable box (digital or analog), satellite receiver, or DVR to a computer or mobile device -- it's just that each is aimed at different segments of the market.

ENGADGET: Slingbox PRO, Slingbox AV, and Slingbox Tuner get official

The new Z-Base sound bars offer two analog audio inputs, one optical (toslink) digital input, one coaxial digital input - plus a front panel 3.5mm analog stereo input for convenient connection of an iPod or other portable audio device.

ENGADGET: ZVOX intros three new Z-Base models, lowers the pricing soundbar