The MESA EL-34 STR-447
is Mesa's very best overall EL-34 - It's a premium grade, NOS (New Old Stock) equivalent and tube of choice in the production of all new Mesa EL-34 powered models. It has a traditional EL-34 tone & feel that is very urgent and aggressive and is an excellent choice for all styles of gain, especially classic rock, alternative rock & metal. This tube is true to the crown with focused low end, crushing mid range crunch and crystal-like highs. Excellent structural quality provides exceptional consistency and reliability.