After using it a bit more and comparing it to my son's Skullcandy speaker, I'd say that the device is definitely bass heavy. For songs already bass heavy it was almost too much. I did modify my equalizer settings to test and treble was very good with default settings. So to answer your question, I think treble sounds good depending on whether or not you are using equalizer options available for your device. FYI, I used Sia's Big Girls Cry for my audio test.