2 NOS Matsu/Mullard 12AU7 ECC82 Vintage Preamp Audio Tubes Tight Match

2 old stock matsu japan 12au7 ecc82 audio / preamp tubes, tight match. Vintage'60s production w/ the most precious tube-era metallurgy.

Legendary mullard influence via transfer of technology. Carefully curated + screened direct japan import, twice tested.

Full amplification and life test 101/105 105/110 % (65 % good). Our unique gm output test applies 225 vdc simulating actual operations w/ filtered dc. Authentic vintage hifidelity audio curation by caliacoustics.