Description Electro Harmonix 6973 Platinum Matched Duet 2 Pieces.Finally, another option for the increasingly hard to find 6973. This is the real deal. Not a rebrand of a “close” tube. Many OEMs use relabeled Electro Harmonix vacuum tubes in their amplifiers Made In Russia Electro Harmonix tubes are all new designs and are of excellent quality. Many OEMs use relabeled Electro Harmonix vacuum tubes in their amplifiers. If you want great sounding tubes at a very reasonable price, then Electro Harmonix tubes should be on your list. Electro Harmonix 6973 Data Sheet
