Looking to add ERA 300 speakers to my surround sound, would like to install them on the shelf in the picture where the red circles are. The speakers would be 10’ high, 10’ from the back of the sofa and 25’ from the TV (if that matters). As you can see its an open floor plan with no good place to put them on the wall or on floor stands. Would they be effective on that top shelf or am I wasting my money?


