Ok, since no one really explained the setup on these speakers. I've had a pair for the last year so.. here it goes.
there are 5 pieces to this system. 2 Main speakers, 2 surround sound units, and 1 sub woofer.
there are 2 inputs, one for the RCA plug, and one for the regular 2.5(1.5?) mm audio jack. THIS IS A TWO POINT ONE(2.1) system. ONLY FRONT channels. (heh, but since I own a pair already i'm buying another one for a 4.2 system =). )
The sound quality is great, it doesn't distort pretty much AT ALL unless you've got volume turned up to 100%(I have treble on the speaker system turned up to ~75% power, the bass set to standard), and even then, not much. I have to admit though, the 2 surround speakers kinda suck. So I mainly just use the 2 main speakers(note: the surround units are off completely unless you press the dolby digital surround button)
at this price, for the sound quality you get it's insane! Simply insane! I hope I get the extra set i ordered. =)
Good luck to you all too.