2 Matched NOS Matsu/Mullard 12AU7 ECC82 Preamp AudioTubes Free Postage

Also be sure to check out our offical site to reserve/request... 2 old stock vintage production matsu national seam-top 12au7 ecc82 preamp audio tubes. Legendary mullard tooling warmth and quality influence via'transfer of technology' licensing agreements. National tubes feature uniform noise-free characteristics, long service life, and superior sound reproduction. Direct japan import carefully curated screened and twice tested.

Latest sonic review: "great balance across the whole range, simply wonderful rich full sound". Full amplification balanced test 110/110 110/114 % gm (65 % good) + our useful life test pass! Our unique gm output test applies 225 vdc simulating actual circuit operations w/ filtered dc + leak short gas check.

Several more pairs available including sealed box true nos, see our other listings or send a message. Authentic vintage hifidelity audio curation by caliacoustics.