Matched Pair General Electric GE 12B4 12B4A Vacuum Tubes Valves NOS NIB Sonotone NOS NIB 5-7 out of ten

5-7 out of ten

It sounds terrific and has great bass and sparkling highs and Donald Fagan’s voice is warm and clear as a bell

where minimum (65%) is 18/18 and 100% is 28/28

I can't tell you how they sound as we don't have any equipment that runs them

This quad of US-made 6211 dual triodes was tested on our Hickok 800 for shorts

Matched Pair General Electric GE 12B4 12B4A Vacuum Tubes Valves NOS NIB Sonotone NOS NIB 5-7 out of tenThis new old stock, new in box matched trio of GE MANUFACTURED 12B4A tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They measured 47 and 50, respectively, where minimum (65%) is 32 and 100% is 49. Wish I could tell you how they sound, but I don't have any equipment that uses these. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT