2 matched vintage audiophile philco japan 6aq5a audio tubes

premium low noise 6aq5, vintage 1967 production w/ same build code + twice tested!

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literature and/or rca manuals describe these as a slightly lower voltage mini envelope 6v6...

also revered for pleasant distortion at lower volumes, great for recording and listening

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full amplification + useful life test didnt move the meter 112 ~ 112 % gm pair (65-130 % good) + short gas leak check

our unique mutual gm output test applies 225 vdc simulating actual operations w/ filtered dc

simply put higher gm scores = stronger amplification capabilities via gain and bass response

also supplier tv7 double checked and matched for conductance (1 more pair in stock at 110/110 %)

while your specific bench results will definitely vary, a circuit test = best test

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all tubes also undergo a proprietary value-added complimentary refurb process! one of a kind seller qc

always give 100+ session hours w/ your specific amps voltage to fully cure (break-in is important)

ships well packed worldwide, combined postage available ~ 2 pairs in stock + 1 single ! buyers pay all postage

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~authentic vintage audio curation by caliacoustics~