full conductance test 115/120 % mutual gm (65%)+ life test pass! (life check = key feature indicating longetivity)
our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test and leak/short check
gm scores relate to current transfer ability, whereas gain relates to signal amplification ~ a subtle difference via actual voltage
plus full sound auditioned w/ closed back ultra high resolution monitors and aira preamps = noise free + no microphonics
true nos = give several sessions or up to 100+ hours w/ your specific amps voltage to settle in (break-in is important)
ships well packed worldwide ~ authentic vintage hifidelity audio curation by caliacoustics
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free economy postage worldwide, priority available upon request for additional $46 flat rate usps well packed