A:
To hear the same audio from all of them you should simply double up on one of the ports. Connecting these additional speakers to left and right channels on the Onkyo. If you are using 5.1 as the setting you arent actually hearing the same audio on all of them as front speakers play different sounds than rear speakers, but in order to hear music through all you would want to change the setting to 7 channel stereo when playing music (or 2 channel).