I am installing a 7.1 surround sound home theater. The room is nine feet high, but I have a soffit that goes around the side of the room and hangs down about 18 inches and sticks out from the wall about 24 inches. What is the recommended height for the side speakers? I have been told ear level standing up, but if I stand on the riser in the back of the room, ear level speaker placement puts the top of the speaker about 10 inches from the ceiling. Do I have to worry about sound echo off of the ceiling? Thank you for any input.