a true time capsule, 2 rare old stock black plate 6005 6aq5w audio tubes by toshiba, premium upgraded 6aq5

revered black plate tone is legendary for its rich open detailed resolution and imaging, 1 dgetter / 1 thick halo getter

carefully curated vintage twice tested direct japan import, quite strong matched pair

~

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

~

full amplification test 100~100 % gm + useful life test stayed at 100~95 % (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 for conductance, while your specific bench results will vary, a circuit test = best test

~

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 ~ buyers pay all postage

~

~authentic vintage audio curation by caliacoustics~