Ovation Guitar #0038 Quality Control and Acoustic Analysis Records

This is an internal Ovation guitar factory quality control document for guitar number 0038, Model #1687-7, Serial Number 0038-91, initiated by technician K. Loggins on 4/15/76. The document includes multiple inspection entries (#38-1 through #38-4) tracking measurements of resonance levels (RL), signal-to-noise ratios (SN), and other acoustic parameters across several dates in April–August 1976. Two frequency response charts dated 9/10/76 (approved) and 9/23/76 (received) show acoustic output measurements in dB across the full frequency spectrum, with key resonance peaks annotated.