Passive speakers connection
i thought my trust 2.1 speakers wear broken so i went out to pc world and bought some logitech 2.1 speakers, using both green headphone jacks on my pc (front and back) i got them working, 4 speakers, 2 subs. then on the back of my trust speakers (on the sub) the satellite speakers plug in with 2 phono plugs, one each, so i got to passive speakers, sony hi-fi passive speakers, and i twisted together the speaker cable so each speakers positive where connected together and the same for negative, i now had 2 speakers and 1 connection. i then connected the speaker cables to the phono and forced them in (red-positive, red and black-negative) the sub acted as a preamp ( some how so now i have 6.2 working, 6 speakers, 2 subs!
hope this helps!