I just installed the x910, and had a question about the "Rear SP". I have a aftermarket amp and sub setup on the sub rca. Will when I first turned the power on the sub from the head unit I wasn't getting much out of the sub, but the rear deck speakers where putting out crazy bass. Initially the rear sp was set to "Sub W". Later I read in the manual that the sub w setting you can connect a rear speaker lead directly to a sub without using an auxiliary amp. So i am assuming that when you turn the sub on it increases power the to rear speaker channel with sub w on? Now I went back and chage
