Hi Josh,
I'm making two front corner traps, using the design of angling 24" wide framed insulation across the corners. So i won't be making those cylinder types. I hear they work well, hoping this type does too.
I don't know if you saw the closet trap thread but if that is a good idea I'd use the same material on those, which are in the rear corners. The closets would provide 30" depth behind the insulation so it seems would trap deep bass. But I'm inexperienced at this. There is definitely bass lift in the closets waiting to be swallowed up.
If possible the same material used will be good for broadband absorption too.
The other part of the plan is to do broadband on side walls of front and rear corners, and 1st reflection points (walls and ceiling). I'll get a 1" or 2" material for this.
Don