We recently moved into a new home. It was built in 2015 and was pre wired for sound. There are six speakers in the home, two in each room and three zones. The receiver is missing, but there are 8 paired wires coming out of the wall in a central location that is boxed in 7.5 x 3. The prior owner's son stole the unit, so I have no idea what options I have to replace it. Thank you for your help