The MESA STR 450 EL-34 is a German made, "A" grade NOS (New Old Stock) Siemens EL-34. This legendary European EL-34 is known for its unsurpassed "bell-tone" clarity and touch sensitive sustain & articulation. Premier German engineering provides outstanding structural quality that makes this a toneful, consistent and reliable new old stock classic. Quantities are subject to limited availability.
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!
Remember… our dedication is to create the world’s finest tube amplifiers. And to achieve that goal requires a deeper commitment to tube quality… because the reputation of our amplifiers depends on it.
Substitute in: MESA amps biased for EL-34s or with bias select switch