Ruby 12AX7WBCHG+ High Grade PLUS Pre Amp Tube
The Ruby 12AX7WBCHG+ a Chinese copy of the Sovtek 12AX7WBA featuring lower gain, quiet, commonly used in Blackstar and Loud amps
All Ruby pre-amp tubes are properly tested for quality assurance.
HG Grade: RUBY standard grade that will work in all positions in an amplifier except in very high gain circuits, usually the first gain stage in a combo amplifier.
HG plus Grade: For use in high gain circuits