Description

audiophile crown jewels, revered worldwide for their rich holographic sound stage imaging set of 2 vintage grey plate mullard mitcham cv455 (special 12at7 ecc81) audio / preamp vacuum tubes pristine matched pair w/ authentic r7j5 ~ r7j1 etch codes and mullard boxes, old 1967 production carefully curated screened and twice tested, plus complimentary proprietary refurb deox process full gm conductance test 106/106 ~ 112/114% gm (65) + important life test pass! ( longetivity indicator) + plus an impeccable gas test and leak/short check +complimentary value-added complete refurbish screen and deoxit process give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important) ships well packed worldwide w/ boxes 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