After trying these speakers with my smartphone I am amazed by the sound quality these electronics produce. The bass response is simply fantastic. The size and portability of the speakers make them easy to take anywhere, making them a great addition to my MP3 player accessories. The only downside is that they require charging, but that's a minor ISSUE given the outstanding audio output .Overall, I highly recommend these speakers for anyone in search of an affordable, portable external speaker solSee full review