Every bass I have ever seen has been either made from plywood, had a spruce top with maple back and sides, or has had some combination. Putting the plywood instruments aside, why is there only one combination of woods that are ever used to make hand carved basses? Look at acoustic guitars: The top is usually made of spruce, but often it's cedar. The back and sides are occasionally maple, but they're often mahogany, walnut, koa, or rosewood. Why are basses always confined to just using maple for the back and sides? This also applys to violins, violas, and cellos.