4 old stock matsu japan ecc85 6aq8 preamp audio tubes
legendary mullard influence via 'transfer of technology' license agreement and quality metallurgy
revered tone by audiophiles worldwide
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full amplification test 104/104 ~ 101/106 ~ 120/119 ~ 88/110 % mutual gm (65 % good)
our unique gm output test applies 225 vdc simulating actual circuits w/ filtered dc +leak short gas life check
all tubes also undergo a complimentary proprietary one of a kind refurb process, value added seller qc!
give up to 100+ session hours at your specific amps voltage to fully cure
ships fast well packed worldwide, combined postage available
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~authentic vintage hifidelity audio curation by caliacoustics~