A:Answer Depends on the impedance of the speakers. Generally, I recommend not using multiple speakers like that because you can't set volumes and such, but remember that parallel cuts the number of ohms in half, series doubles it. The W rating is based on 6 Ohms, but I think its stable down to 4 (check the spec sheet). I wouldn't go lower than that. So, 8 ohm speakers in parallel for a 4 ohm load, but 4 ohm speakers in series for an 8 ohm load, and don't mix and match dissimilar speakers.
Also, only 2 outputs (stereo only) can go to the second room.
