I bought this for my daughter who pregnant, traveling, listening to music on his mobile xperia z. The sound in the long mobile broke my ears ... As soon delivered as soon connected. Given the size of this chamber, I was a bit skeptical. What bluff !!! No more metallic sound, the sound is now more rounded, balanced, surprising for taille.Comme I told my daughter, do not push the sound background in the beginning, a break never made mal.Le connection the wire to the speaker is fine ... if we focus not take soin.Mais if JBL is the standard of the brand, then no worries; my pc speaker JBL, purchased in 1994, working as the first day. Amazon delivery always on top!