Ovation Adamas Guitar #49 Research and Development Documentation

This is an internal Ovation R&D document from 1976 detailing the construction specifications and acoustic frequency response testing of Guitar #49, an Adamas model 1687-7 (S/N 0049). The document includes detailed top bracing measurements, bridge weights, rim thickness data, and two frequency response graphs comparing the guitar's acoustic output across the full audible spectrum. The second frequency response chart, dated 11-29-76, was produced by technician D. Johnson and includes a handwritten note indicating the overall amplitude was 'probably too low by 25 dBs.'