Anyone Damp the insides of your Speaker Cabinets?

If you want to add material to suppress vibration one of the better materials to use is polyester batting.

It comes in different thicknesses and can be found on the web or at a local haberdasher.

It will hold it's shape and thickness compared to other materials.

Google fatt batt :-)

There are many ways of bracing, but introducing anything that affects the internal reflective properties of an enclosure may result in acoustic changes that are undesirable.

Shelves with hole(s) are used often, but it is calulated and incorporated into the enclosure design.

The technique in a prior post about using table legs to brace the sides has a lot of merit, in that it has the least impact on internal soundwave reflections or the possibility of creating standing wave traps.

Installing large diameter (1" - 2") wooden dowels in a finished enclosure can be probelmatic, but not unsolveable.

They would need to apply a little bracing pressure on the sides of the cabinet , which will be key in the success of this project. Fastening the dowels in place can be accomplished using epoxy on the ends.

Using seasoned wood is key, since it could shrink.

I have seen round aluminum bars and is worked very well, but in that case the enclosure had double sides and the bars were held in place with bolts hidden by the outer layer

Regards