The Phonograph Monthly Review, Vol.1; No.1, Oct. 1926 Published 2022/09/14 at 1200 × 984 in Things I learned on Phono EQ curves, Pt. 2 ← Previous Next → source <cite><a href=httpsarchiveorgdetailsPMR 1 1pagen21mode2up>Brunswick Electrical Recording <a><cite> Elmer C Nelson The Phonograph Monthly Review Vol1 No1 pp19 21 October 1926