EL34EH platinum matched quad

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."
Our platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps.