The Electro-Harmonix EL34EH is extremely musical and predictable with a sound that is rich, smooth, and detailed without being edgy. It is the perfect EL34 for vintage equipment and a sure way to improve the performance of modern equipment.
According to the technical journal, Vacuum Tube Valley, "The Electro-Harmonix EL34EH is balanced throughout the entire music spectrum. Bass goes deep and is tight, mids are sweet and well defined, and highs are detailed and extended."
Mullard EF86/6267 NOS/NIB; Made In England. New in original box, white printing on tube, no date code, V 15 marking on bottom, long solid screen, "O" getter, very rare, 1970's Mullard.