PX4 - the best audio amplifier valve?
The PX4 was designed by Marconi-Osram in the 1920's and many audio enthusiasts believe it to be the finest-sounding power triode ever made. Properly installed in a single-ended triode amplifier driving efficient loadspeakers, the PX4 produces a sweet and beguiling sound whilst preserving the finest detail.
- Directly-heated cathode
- 300v anode voltage
- 50 mA current
- 4 watt power output
Valve or Tube - What's in a Name?
In England we call a valve a valve (or [slang] a bottle): in the United States it's a tube (pronounced toob). Does it matter? No. Also for anode (England) read plate (United States).