Building a 5.2.4 system for a customer. The room is 17 wide 13 feet deep. He only wants a 65 inch tv. The room layout is open space build. Behind the living room goes into kitchen and dining space. Side surrounds speaker have to be at 12.2 feet. After that is studs and glass door 8 feet on one side other is hallway. So he wants to sit between 13-14ft back. So he's behind the surrounds. Has anyone had a customer like this? No idea what to do. Told him it will sound like crap being behind the sound.
I would encourage you not to do that job. It is likely the customer won't like it and blame you. The fact the width of the room is larger than it is long is a big problem as well as all the bass leakage. That sounds like a room that is totally unsuited to multichannel audio. It sounds like a living space area, and in that case is only suitable for two or three front speakers and a sub. In a space like that in wall works best and has the best WAF.
Built on the orders of my wife, and she loves it. Two way left and right, MTM, and three way center and in wall TL sub. That is the way to handle a space like you are asking about.