EL-34

High-Power Pentode Audio Output Tube, capable of delivering up to 25 Watts of clean audio power output in a single-ended configuration or over 50 Watts in a push-pull pair. Operating from a 6.3V heater, it handles the primary acoustic output stage in classic high-fidelity stereo amplifiers, theater sound decks, and professional guitar amplifiers, housed in a standard large 8-pin Octal-style base glass envelope.