Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No Bass, No Volume

I have no idea how these phones get such a high user rating. They have absolutely no bass whatsoever, and the volume distortion breaking point is only about half way. So no volume either, unless you like the clicking and twitching sound of over burdened speakers. I tried a variety of music styles and formats, along with various types of players. I also used both the headphone jack and the RCA direct line-outs. The RCA lines sounded *slightly* cleaner, but not much. Also, they are NOT AT ALL Silent to the people around you.I must add that I did not have any interference, humming or static that other people were persistently complaining about. The volume and tuning knob locations don't bother me either. Build quality is as good as anything else coming out of China these days, not good, not bad. They are comfortable, and the charging system is well designed and effortless to use.All in all, the sound is the most important feature. Unfortunately they fail miserably.