Nos Nib Mullard Cv2984 6as7 6080 5998 Type Best Headphone Amp Tube

ALL TUBES TESTING GREATER THAN 6,000 GM (5,800 GM MINIMUM NOS)! TUBE 1 6,000 / 6,200 TUBE 2 6,100 / 6,040. TUBES TESTED ON LAB GRADE KS15750 MAXI PRE TESTER AND TUBES EXCEED STANDARDS FOR SHORTS, EMISSIONS, GAS, GAIN, GM, AND SPECIAL HAND SELECTION.