The E34L is a long life EL34 type tube with thick and especially strong glass. It offers a lot of mordant in highs, punchy mids and deep lows. A wonderful EL34, with great tone for Hi-Fi as well as musical instrument amplifications. Tube with a great body and power. Perfect for those who want to fatten up the sound of both their guitar and HiFi amplifiers. This tube is produced at the JJ / Tesla facilities in Slovakia and selected under TAD standards.