Etienne Laprevotte (c. 1790–1856) was a skilled violin maker working in Paris during the first half of the nineteenth century. He is best remembered, however, for his fine guitars with their unconventional oval-shaped sound holes. Laprevotte built his guitars based on the principles of violin design; his maple backs were carved into an arch and lacked bindings. Most distinctively, he parted with traditional internal cross bracing to support the soundboard, opting instead to use two (sometimes four) longitudinal bars that ran the length of the body, separated by an elliptical sound hole. By parting with the traditional harmonic bar system, Laprevotte’s design allowed for freer movement of the soundboard, thereby lowering the frequency of the Helmholtz resonance which created deeper and richer bass tones.