Ovation Guitar #76 Internal Research/QC Document - Model 1689-8 Build Specs and Frequency Response Analysis

This is an internal Ovation guitar research or quality control document from 1977 pertaining to guitar unit #76, a Model 1689-8 (S/N 0076). The first page (dated 1/5/77) details construction specifications including top wood, bridge dimensions, brace weights, and thickness measurements across RL, SN, K, and FF categories. The second page (dated 8/23/77) contains a frequency response graph plotting decibel output across the audible spectrum, with numerous resonance peaks and troughs annotated with specific frequency values.