DIY speakers of solid/reclaimed wood?

There are a great many examples of early American furniture, you know, Chippendale, Shaker, Queen Anne, etc. made from solid American hardwoods, including but not limited to maple, mahogany, rosewood, poplar, and walnut that have survived in all kinds of climates, even before the advent of air conditioning, humidifiers, dehumidifiers, without damage such as splitting, warping or any such thing. Ditto musical instruments like Stradivarius and other very old violins, cellos, what have you.

Ok,well now I need to find out what methods are used to keep the wooden instruments and the daedalus speakers in perfect condition.
I do know for a fact that very old furniture and woodwork does require regular maintainence and repair. 

It wouldn't be my choice but I reminisce at the look of my road worn DYI birch plywood JBL 4530 scoops.

A close inspection of the underside of most every Viol table (spruce top) you'll find inlay patches holding the grain together. 100 degree heat is murder on old hide glues.

I finally sold my Pollmnn Busseto Double Bass because of the constant maintenance it required. The older it got the more it needed and I live on the centeral California coast. I'm down to the pre WWII Benedict Lang laminate and a recent Upton Bostonian.

Use a high quality water proof wood glue and screws were possible.

There are a few technics to prevent expansion cracks. The most probable  easiest is to rip the wood into stips,  maybe 4 to 5 inches wide and regluing them to fairly well match wood grain.  These small strips do not expand like something that is say 12 inches wide.  
There are other things that you can do,  it just takes a bit of know how. 

After googling around a bit I found out the daedalus speakers are not 100%solid wood,other materials are employed.The old wooden instruments had to have been carefully stored,maintained,and occasionally repaired.The secret to the pieces of wood used is the way it is slowly and completely dried then sealed completely.Darn,I actually had to think and learn something new today:)