Balanced Genalex 12AU7/B749 Preamp Tube The Balanced Genalex 12AU7/B749 Preamp Tube is one of the most rare 12AU7 types ever made. This tube featured superb linearity, balanced sections, and extremely low noise. The reissued Genalex Gold Lion ECC82/B749 features gold plated pins and has been carefully engineered to recreate all of the attributes of the original. This tube is a premium replacement for all 12AU7, ECC82, 5814, and 6189 types. Get the datasheet here.
