Sounds good to me as well. Don't quote me on this, but I think the + has some type of amplifier for the external speaker. I've also heard that its designed to 'bounce' the sound off of a flat surface giving the best possible sound. Either way, it sounds good to me for a phone speaker.
Beats audio is possible through video playback on speaker. I saw the little red B when I was watching a vid (I forgot if it was a video I made or one online)
Sent from my behemoth of a phone, the Galaxy Note II.