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The Mesa Boogie EL-84 / 6BQ5 tubes are the little brother to the EL-34 and are the classic European designed tube that lead the British invasion. Mesa Boogie's EL-84 is tight and aggressive, yet smooth and warm, with an amazing chiming mid and top end. It has a brilliant focus with a frequency response that always brings your guitar to the front of the mix. These Mesa Boogie amp tubes comes as a matched pair. They stay true to their classic roots, being extremely consistent and reliable.

Mesa Boogie starts with the finest tubes from around the world, tests and matches each one under simulated operating conditions to the tightest, most demanding industry spec. Then backs them with the best warranty in the business.

Robotube State-of-the-Art Tube Tester
With the brains of a computer and the ears of a musician, Robotube runs a battery of seven exacting tests on each power tube and analyzes performance so thoroughly it can even predict the tube's lifetime. Designed by Mesa Engineering and built for us by an aerospace firm, Robotube is a one-of-a-kind machine and easily the most modern and powerful in the industry
MESA/Boogie EL-84/6BQ5 Amp Tube - Duet Duet