1x Vintage 1960s Mullard Gt Britain Special Edition GreenTip InstrumentGrade ECC81 12AT7 NOS ~ Grail Holographic Rich Beer Pub Classic Tone

mullard gold label special editions are limited run (2-year only) top sonic echelon for rich holographic sound reproduction 

like a live pub concert in your living room, this hard to find greentip selection is the lowest noise and purest sound! from 1963

revered worldwide by audiophiles, the true harmonic sound stage of mullard is warm and captures immersive lush fidelity

the precious metallurgy of the early '60s is legendary for liquid dynamics, sparkley highs, and great rich ambient bass resolve

whether playback or production, the vinyl style intimacy is sought after for vocals, instrumentals and percussion depth

authentic blackburn b3d1 etch code and nice gold silkscreen, thick green-tip special selected, and mullard box included

all tubes are twice tested, circuit auditioned

full conductance balance test pristine 106 / 101 % mutual gm (65 % good) + important life test pass

our life test is a key longetivity indicator, and our unique gm output test applies 225 vdc simulating actual circuit load

all tubes are also checked w/ an impeccable gas + leak/short check, and a proprietary complimentary refurb deox process

give 100+ session hours w/ your amps voltage to fully cure/settle (break-in is important)

ships well packed