Ovation Guitar #0040 Internal Research and Testing Document

This is an internal Ovation guitar research and quality control document for guitar number 0040, model #1687-8 with serial number 0040-95, dated approximately 1976. The first page contains detailed construction specifications including top angle, weight measurements, bridge dimensions, and individual brace weights totaling 42.7 grams, along with installation notes dated 8/3/76. The second page shows a frequency response graph dated approximately 9/10/76, plotting the acoustic output in decibels across a wide frequency range from 30 Hz to over 9000 Hz, with notable resonance peaks annotated at frequencies such as 95, 101, 550, and 730 Hz.