2 Rare NOS Mullard 45+90Degree DGetter ECC81 12AT7 PreampAudioTubes + FreePost

Audiophile crown jewels, revered worldwide for their rich live-concert holographic sound stage imaging. Set of 2 vintage grey plate first edition mullard 12at7 ecc81 audio / preamp vacuum tubes. Rare 45 degree and 90 degree dgetter assortment, includes mullard boxes, very old'50s production. Carefully curated screened and twice tested, plus complimentary proprietary refurb deox process.

Full gm conductance test 80/8088/72 % gm (65) + important life test pass! (life check = longetivity indicator). Our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test and leak/short check.

Mutual gm conductance scores are the ability to transfer current especially important for push-pull preamps. Also double checked (twice tested) for mutual gm conductance via supplier tv7 / hickok 539c. Give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important). Authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics.

Including limited special editions + rare true-nos sealed box + pinched waist. Also high-resolution headphones + premium vocal stage and studio mics. 6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cca.

12ax7 12at7 12au7 12bh7 / ecc83 ecc82 ecc81 e82cc. 6bq5 6au6 6267 6ca7 6ca4 6aq5 / 6v6 6l6 6sl7 6sn7 5y3 5u4 5ar4. 5814 5751 5965 6189 6201 7062 7189 / cv2492 cv4004 cv455 cv4085. El34 el84 ef86 ef94 ez81 ecc85 e180cc gz34.