sonic top echelon! nos 1968 siemens germany e81cc, reference grade premium 12at7 ecc81 upgrade (ecc801 altv)

sought after by audiophiles, revered musical ambient sound stage, phenomenal transparent detail w/ intimate resolution depth

this limited-run is rarer than triple-mica editions and is known to have a bit more air and deliver a touch more warmth

sonically pleasant to listen to, the special e81cc series has some of the best ranked mids of all 12at7 variants

w/ pin-point bass accuracy, extended highs and lush resolve, siemens germany tonal euphony is regarded worldwide

... rumored to rival telefunken ecc801, these are often described as 'more alive than tele w/ less neutral compression'

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audio grade circuit auditioned! known for their lowest noise floor and 10k hour heater lifetime

this tube also includes the original box which adds to its value and collectibility, plus free postage!

we pride ourselves on a proprietary complimentary value-added complete refurb screening deox process

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full tv7 gm conductance test 102/110 (50 good) + our unique life test pass! (very important longetivity indicator)

mutual gm scores are the ability to transfer current, especially important in push pull preamps

visible fragile silkscreen w/ authentic munich 1968 etch code and glass marks! always handle with care
clear glass flashing = give up to 100+ session hours w/ your specific amps voltage to fully cure (break-in is important)
ships fast well packed worldwide w/ boxes
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authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
see our site for limited special editions + rare true-nos sealed box + pinched waist + high-resolution headphones