1977: Ovation introduces its graphite-faced Adamas acoustic guitar with offset sound holes on their guitar tops.1971: A few years later in 1971, preamps, EQ settings, and pickups that reduce feedback are added to lure the interest of musicians who have constant problems with feedback during their live shows.1966: Ovation makes its first guitar and introduces it as the "Balladeer" the following year.He creates a rounded fiberglass back, made of the same material as helicopter blades, and combines it with laminated sprucewood. Using his aeronautical engineering knowledge of the manipulation of vibrations in helicopter blades, he devises a way to increase and shape vibrations in the wood of acoustic guitars to enhance the sound. 1966-1966: Kaman invents a revolutionary new way to make acoustic guitars.Kaman Corp needs new revenue sources, however, so Charles decides to launch a guitar company and apply his aeronautical expertise to reinvent acoustic guitar construction. While there, he sees ways to improve guitar production and offers to buy Martin Guitars.
Around the same time, Charles Kaman travels to Martin's guitar factory in Pennsylvania to get his warped guitar neck fixed. 1964: Charles Kaman's aeronautical engineering company, Kaman Corp, loses an important defense contract.It didn't appear on the scene until well after the guitar revolution had begun in popular music. In contrast to other guitar companies such as Fender and Gibson, Ovation is a relatively young company.