Baltic birch or MDF

[navin advani]

You can use marine plywood as a replacement.
Screws do not tighten enough or may lose threading in MDF. One way to mitigate this is to use D-nuts to mount driver....

Agreed. I have used marine-grade plywood to good effect. Don't worry about all the fancy CLD cabinets, etc. Most of it is more theory than practice. For "normal" systems, well-braced marine-grade plywood will suffice (although most of my cabinets are CLD).

Birch Ply alternative for enclosure?

Baltic ply has overall good characteristics. It's fairly light, relatively stiff and can take a beating. Regular ply is just "less perfect", it'll work without a doubt but there'll always be the nagging feeling that birch ply would be better. With small monitors I doubt it'll matter much...

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constrained layer damping with MDF and Ply

I learnt that aluminium and other materials don’t even have a formal yield point like steel has (picture), but that we agreed on an arbitrary value that keeps things together long enough. yes that is true. There is an accepted definition of yield point that we use for aluminum and titanium...

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Constrained layer damping adhesive

Anyone have experience with this material? https://www.menards.com/main/flooring-rugs/exercise-gym-flooring/amorim-reg-1-4-rubber-sports-floor-4-ft-wide/405f014/p-1559630031755-c-1536584011607.htm Rubber flooring used in gyms and training facilities. It is available in recycled rubber and...

www.diyaudio.com

Troels designs are very very specific to the exact drivers he uses. The design consists of the drivers, cabinet dimensions and crossover as a combined unit. ..Then buy his crossovers and get the exact cabinet built. Any deviations in the above, and one is on his own.

Agreed. However, replacing baltic birch with marine-grade plywood shouldn't make a huge difference (at least not one that is audible). If in doubt, email Troels.

Just thought I'd add that SB acoustics have their won recommended speaker designs here

Agreed. Over the past few years, SB Acoustics drivers have had fewer issues (aka build quality and deviations from published specs) than drivers from SEAS or ScanSpeak.