The Talking Machine World, p.58c, Aug. 15, 1925 Published 2022/09/14 at 1200 × 1663 in Things I learned on Phono EQ curves, Pt. 2 ← Previous Next → source <a href=httpsworldradiohistorycomhd2IDX BusinessMusicArchive Talking Machine IDXIDX20sTalking Machine 1925 08 OCR Page 0071pdf>The Talking Machine World<a> p58c August 15 1925