Thanks for you reply. Basically, I have a tv with low end speakers and I did hook up headphone out (the only analog out on tv) to roland monitor cm-30 but the sound is very bad and it's not stereo. So I thought I could use UX2 which is connected to my macbook pro and is located near tv. Currently, UX2 is connected via headphone out to logitech z2300 system (2.1 speakers, powered subwoofer and satellites).
I guess, the only solution I could have is to connect the headphone out of tv to UX2 via 3.5mm to 1/4" line in (I'll have to have a splitter too or use "monitor in"), and then use analog outs to 2 roland monitors, and headphone out to subwoofer in order to get 2.1 speaker set up (all powered). I don't want to use z2300 satellites as they sound terrible (once you hear roland monitors).