Boomboxes trying to make a comeback - with a higher price tag and high-tech profile. WSJ's Willa Planks takes one boombox to the streets to see if they're still cool.

The latest addition to it is the SRS-XG500, which is a modern take on the traditional boombox. Powered by two subwoofers, two passive radiators and two tweeters, the SRS-XG500 seems to be tuned ...