The beauty of making musical instruments with tonewood is that, in addition to sound quality, it can be used to create works of art that are visual as well as acoustic. And, as the "Opera Sonora" is designed to prove, the same can be said of loudspeakers.
Italy's Ciresa has developed a unique vibrational system created by a new transducer, according to 7Gadgets. These speakers would seem to have a natural market in museums, as these photos suggest, where they would be indistinguishable from the exhibits. Or you they could be the perfect complement to a set of custom speaker walls, if you can get the varnish to match.