2 Matched NOS Hitachi Japan 12AT7 ECC81 ~ Rare Special NHK Communications Grade ~ Holy Grail Punchy Jangley Dynamic Warm Tone

the hitachi tone is revered worldwide for its warm punchy tone dynamics, pure playback, and jangley dimensional sound stage

these rare nhk communications-grade top selection are revered for their low noise sound reproduction and high quality screening

the lively expansive harmonics, tonal breakup, and detail reveal without being harsh, all contribute to their collectibility and lore

take your listening/production experience to a higher level of engaging stage detail and immersive harmonic imaging

transform playback articulation and singer vocals across multiple genres w/ more realism and rich bass resolve and texture

these old production types capture live-concert style holographics highlighting instruments and percussion w/ ethereal warmth

carefully curated direct japan import pair, 12at7 ecc81 hitachi japan, fragile old branded or plain boxes included 

twice tested for unparalleled accuracy w/ complimentary refurbish and deoxit process ~ one of a kind quality control

full conductance mutual gm test, nice match balance, several pairs in stock: 

pair1: 104/104~105/105 % gm ~ pair2: 102/100~99/96 % gm ~ pair3: 122/102~120/95 % gm (65 % min good)pair4: 124/120~120/120 % gm  ~ pair5: 115/114~130/114 % gm + 1 single available 93/93 % gm (65 % min good)

+ important life test pass (a key longetivity indicator) + impeccable leak / short / gas check 

give several sessions or 100+ hours w/ your specific amps voltage to fully settle in / break-in

ships fast well packed worldwide