Each quartered hull =
6 in. wide x 8.75 in. long x 1 in. deep.
The inner-rim clamping surface =
I in. wide x 1/4 in. deep
Accommodates a typical 6" to 8" architectural in-wall speaker.
Sand-fill each quartered hull via the sand fill-hole.
Use clean dry sand. Avoid beach sand.
Trim a funnel to sit on the inner-ledge of the sand-fill hole.
This minimizes insertion depth which provides easier flow.
Stand the SandTrap near vertical.
Then scoop and shake to fill a pair in about 10 minutes.
Insert each quartered sand-fillled hull through the custom speaker
Use an adhesive such as 3M Strip Calk to hold in place.
Poster putty is sufficient for the in-ceiling model.
Insert and clamp the speaker to the SandTrap inner-clamp-rim.