300B EHG Gold Version vacuum tube made by Electro Harmonix – directly-heated power triode.
Ultra-long life, high-quality, gold plated grid construction  make it a top choice for Hi-Fi. It has the eight course, directly heated filament like the original Western Electric 300B. Neutral in tone. Wide soundstage, forward dynamic sound.

When ordering a pair or it`s multiples, the tubes are matched free of charge in configurations: pair, quad, sextet or octet.