John Dopyera - The Dobro
John Dopyera was a Slovak-American musician, stringed instrument engineer, and inventor who is known for engineering the resophonic guitar. It has been reported that the necessity of increasing the volume (loudness) of the acoustic guitar within the ‘big band’ environment led to the development of the resophonic guitar, also known as the Dobro. In the 1920s, John and his brother, Rudy, worked together to develop the resophonic resonator guitar. The guitar itself was not the innovative aspect of the instrument, as it pre-existed. The defining element of the resonator guitar was the advanced aluminum disc constituting the resonation device. The aluminum resonator disc was inserted into the guitar body in order to increase the volume and projection of the instrument. The dobro was an instant hit and quickly became one of the most popular instruments of bluegrass and country music.
The dobro’s popularity led to a surge in demand, and the Dopyera brothers formed the National String Instrument Corporation to mass-produce the guitars. By the 1940s, the dobro had become a staple of bluegrass and country music. John Dopyera’s invention of the dobro revolutionized the guitar industry, and he is remembered as one of the most influential figures in the history of stringed instrument development in America.