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So, I have this brilliant idea rolling through my head to build a new sub that looks something like this.
The box is 25.5" x 25.5" x 30" made from 3/4" Baltic Birch. There is a 14" recessed hole in each of the four sides and a 20" hole recessed in the top.
I came up with something like this:
(Note three corner braces closest to the viewer are hidden)
Another view:
I do have some concerns about the feasibility of assembly and complicated design, but have really struggled to come up with a robust bracing solution that's much different.
Any suggestions on how better to brace the box or how to simplify the design without compromising the rigidity?

The box is 25.5" x 25.5" x 30" made from 3/4" Baltic Birch. There is a 14" recessed hole in each of the four sides and a 20" hole recessed in the top.
I came up with something like this:

(Note three corner braces closest to the viewer are hidden)
Another view:

I do have some concerns about the feasibility of assembly and complicated design, but have really struggled to come up with a robust bracing solution that's much different.
Any suggestions on how better to brace the box or how to simplify the design without compromising the rigidity?