seal wood on inside of speaker cabinet?

[pizzachef]

using baltiic birch plywod... should i seal inside surfaces and braces with something like polyeurathane?

 

[chrisb]

using baltiic birch plywod... should i seal inside surfaces and braces with something like polyeurathane?

sorta answered elsewhere - generally not considered necessary - what's the reason? plywood / sheet goods are well stabilized by the time they arrive to your table saw

On some goofy shaped custom car audio enclosures (generally in MDF), I'll paint/pour 2 part epoxy resin and even add some glass cloth around internal seams for reinforcement and to ensure joint seal.

I've built a fair number of the Planet10 designs (mostly in BB ply) and have yet to have any issues with enclosures, unless they've been left on the porch for a few dewy nights

 

[Top Shelf]

I seal the inside of my cabs with sanding sealer(shellac) and seems to work fine. Only reason I do this because they are BR and they are used out doors.