Surrounds for my home cinema and demo room.
You can see hanging hooks and their orientation I'll use when installed. Since there is just one seating row, this arrangement yields a better integration between the tweeter and mid.
These began as prototypes where techniques were tested for dealing with butt joins. The box has been filled with fibreglass reinforced filler and coated with fibreglass resin. This is not a process I'd repeat since it is overly labour intensive and not suited to commercial production and affordability. In the end I've finished these with Duratex which requires priming as it doesn't like the fillers used. So you see here priming and stopper putty prior to applying Duratex.
Stopper putty applied over primer:
After Durate application. You can also see internal bitumen rubber lining. The box is heavy and dead.
Sealing gasket tape is applied: