The first electronic amplification of sound was done with Vacuum Tubes. We have pre-amp, power and rectifier vacuum tubes among other types in New Old Stock from the golden era of American & European manufacturing as well as current production tubes from today.
RubyRuby tubes are manufactured in China and tested for quality and performance.
5AR4 Ruby, Rectifier Tube
Octal power tube (Max Plate Watts = 30W)
Starting at $21.50
12AT7 Preamp tube, Ruby brand
The Ruby 12AX7AC5 HG is Ruby’s most popular preamp tube. These high grade tubes are chosen by manufacturers and builders worldwide for their consistency and musicality. Often described as sounding sweet, the 12AX7AC5 has solid lows, warm mids, and silky highs.