Critticle Lumber shortage- BDA Blues -Acoustics Forum-Acoustic Fields Forum

I was getting ready to build 8 BDA boxes. But there is only 1 sheet of 1″ 4’x8′ MDF in my county or any of the surounding counties.
and the main distributor has no idea when they will get anymore product, it may be several months.

So now I am working on an alternative material for the box construction.

Since this is a material density issue
The densest material I can think of that is still in abundance is Hardybacker concrete board, which is around 6000 PSI.

This product only comes in 1/4″ and 1/2″ so I am figuring out a material to combine the hardy backer with.

Using a high strength epoxy to glue 1/4″ hardy backer to perhaps 3/4 plywood, with the hardy backer on the inside. This will be an in wall build so I don’t care what the box looks like on the out side, so long as it is dimensionally correct.

The hardest part of this is creating the channels for the resonate panels and the peg board to slide into. I may just cut the hardy backer with a tile saw blade into sections matching the spacing between the panels creating the proper gap.

This is all in the hypothetical stage right now hoping for some kind of lumber miracle in the mean time.