As a powered subwoofer for your car, the Blaupunkt Velocity 2Go installs easily and delivers a reasonably powerful bass thump. But this sub gives you more bang for your buck in that it works as a semiportable speaker system for an iPod or other MP3 player. In the latter incarnation, it adds pairs of 6 1/2-inch woofers and 1-inch tweeters to its subwoofer output.
Get ready for iOS 8
Here's what you need to know before downloading iOS 8 on your iPhone or iPad.