Sentey LS-4460 B-Trek S8 Bluetooth Portable Stereo Speaker (Black)
This speaker sounds very good to me. I've just played everything from Mozart to lowdown funky Louisiana blues through it.  As for using as a hands-free speakerphone, my wife said she couldn't understand what I was saying when I used it from my car. I'll withhold judgment on that until further testing. I've had a smaller BT stereo speaker from Arion for over a year that I liked, but this Sentey B-trek S8 sounds much better, with more bass and volume, though less treble.  I was able to keep music playing from