set of 2 vintage hitachi 12au7 ecc82 audio preamp tubes, short plate grey mica warm tone! 1 halo getter / 1 dgetter
these old production types have the most tube-era precious metallurgy, fidelity and quality
carefully curated screened and auditioned direct japan imports / rare collectibles
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full amplificaton test 102/114 ~ 94/120 % mutual gm (65 % good)
our unique gm output test applies 225 vdc simulating actual circuits w/ filtered dc
+ life leak short gas checked, also supplier tested and auditioned via tv7 for conductance and noise
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all open box tubes undergo a complimentary proprietary refurb deox process! one of a kind seller qc
give 100+ hours at your specific amps voltage to fully cure due to long term hibernation
ships fast well packed worldwide, combined postage available
~authentic vintage hifidelity audio curation by caliacoustics~
check out our official site! reserve/request options, true-nos sealed-box rarities, and limited run special editions