audioXpress May 2025 PDF

Issue 5
May 2025

• FROM THE EDITOR’S DESK—Learn About the Music You Like, by J. Martins, p. 4
  
• 78 rpm Returns, by Michael Harkins, p. 8
  
• The Ultra-Linear Power Amplifier: An Adventure Between Triode and Pentode, by Rudolf Moers, p. 16
  
• Getting Less Gain from Tubes, by Merlin Blencowe, p. 28
  
• Micro Details in Push-Pull Output Transformers, by Hans Polak, p. 30
  
• Type 3 Mu Stage Breakthrough, by Alan Kimmel, p. 37
  
• Prototyping Alan Kimmel’s Mu3 Stage, by Kim Bond, p. 41
  
• Anomalies V2: Leaving the Trodden Speaker Path, by Ben (Wolf) Shaffer, p. 44
  
• Coffee Can Towers, by Ken Bird, p. 50
  
• A Primer on Class-D Amplifiers: Part 2—Practical Implementations, by Paul Marchese, p. 57
  HOLLOW-STATE ELECTRONICS—Do It Yourself with Tubes, by Richard Honeycutt, p. 62