WHAT: Bluetune-solo Bluetooth X-Bass Speaker
HOW IT WORKS: A small-in-size, big-in-sound portable speaker made by Divoom. The internal rechargeable battery spits out power for eight hours, and the "audio out" port means you can impart Bluetooth capability to other speakers with this one. It has a microphone toggle button so you can take phone calls via Bluetooth.
HIGH POINTS: The audio science of smaller speakers with bigger sound fascinates me because I'm always looking for the most easily packable, biggest sounding speaker I can find. Standing 2 ¾ inches high, this one's a beaut. There's nothing like playing your favorite music in new settings the world over. This comes with a cable for non-Bluetooth devices, but the Bluetooth range is impressive. It's advertised to function at 30 feet. It does all of that. It has much better bass than other speakers this size, but don't expect that throb you might get from a box speaker; this simply generates the range of sound you expect from your music. For good measure, jack up the bass on your equalizer. The sound is big enough that you most likely won't play it at full blast most of the time. This rugged speaker, which comes in five colors, is built to last.
LOW POINTS: My one complaint: No volume control on the device, so if you want to adjust, you need your source nearby, unless you like to walk.
-- Ross Werland, Chicago Tribune