The Mesa EL-34 STR 447 is their very best overall, premium grade NOS equivalent EL-34 and their tube of choice in the production of all new Mesa EL-34 powered models. It offers traditional EL-34 tone & feel – urgent and aggressive – and is an excellent choice for all styles of gain, especially classic rock, alternative rock & metal. This tube is true to it’s British origins with tight, focused low end, crushing midrange crunch and crystal-like highs. It’s one of our favorites for authentic Brit tones.

Mesa power tubes are among the highest quality available and selected for their exceptional full-range tonal quality, consistency and reliability. All Mesa tubes offer unsurpassed consistency and reliability for ANY tube amplifier, and certainly Mesa amplifiers!