to be safe, build the back wall from subs. You have never heard anyone say
I built a wall of subwoofers and I so wish I hadn't
How many subs?
I got my room analysed by an acoustic engineer.
3 subs - 2 with delays.
Maybe I did not have the gain set right for each sub?
The pressure in the room was overwhelming. Opening the door was a relief.
One sub - front left - the one with no delay in the design seemed really good.
But I got hungry for more - so I tried 2 subs.
Does anyone have experience with using a multi-sub setup using delays?