iTour-Pop Portable Rechargeable Speaker for iPod, Sansa, Zune, iPhone 5, 4S, 4, 3GS, 3G, BlackBerry, HTC EVO, DROID, Samsung Galaxy S3, 2, LG Optimus G, and more (Color Option: Black)
This is a powerful little guy.  I wanted a speaker to play tunes on that would be portable.  I hooked it up to my Kindle Fire to play Pandora and wow!  It has two settings when turning on.  One has more bass.  If you are expecting to fill the entire house with it you would be wrong.  It will however impress you when playing in a large great room.  It was well worth the money.