A picture of my Loftin-WHite PX4 amplifier

PX4 - Makes Magical Amplifiers

PX4 - some amplifier designs

Here we'll show pictures and schematics of various amplifier designs, if you have a PX4 amp and you'd like to see it on this site, send us the details.

My Loftin-White

  • Valve lineup: GZ37, CV2492, PX4
  • Single-ended triode
  • No feedback, reveals all the detail in the signal
  • Directly-coupled, no interstage transformer or capacitor
  • Point-to-point wiring
  • Retro-styling, with solid Brazilian mahogany cases
  • 4 watt power output
  • Audio magic driving Klipschorns