I can some reviews here on Amazon agree not to the NWZ-B183 is louder in direct comparison to its predecessor NWZ-B173, the sound quality is just as well, and the bass is still a little intense!
These factors also depends heavily on the headphones used as an MP3 player is only as good as the headphones used to make it.
The NWZ-B173 also has a good folder function, so you can organize your music collection very easily, so you can keep track.
However, one disadvantage has the NWZ-B173, like its predecessor, although it can not listen to music via USB to connect a radio and the like, as it switches to the charging mode and no music playback is possible!
In any case this MP3 player from Sony is superior to any smartphone when it comes to sound quality!
I advise everyone of any other headset has a parr to to buy, because the enclosed are not the best, so the quality of the MP3 player is lowered.
