Ruby 12AX7AC5 HG+
The Ruby 12AX7AC5 High Grade tube is the Shuguang 12AX7 9th gen tube, but distributed by Magic Parts. These are a very consistently made tube, sweet sounding, and very warm. "High grade +" is one of the labels in the measuring system used by Magic Parts. It basically means the tube is best suited for the most sensitive first gain V1 spots. New 2024 production.