The 39g has great sound quality. It’s an excellent speaker for running and beyond. I run with a stroller and my kids love listening to music using the 39g while we log miles. A great feature is the magnetic clip in the back.
this little speaker rocks! i just clip it to my clothing with the clip or magnet, connect to my ipod or phone and run. i’m still able to hear what’s around me(no earbuds). very safe and the sound is incredible for something so small. easy to operate