illuminate your preamp w/ 2 old stock telefunken germany 6ca7 el34 power preamp audio tubes, same code 1967
take your listening experience to a higher level of 3-dimensional engaging detail and immersive holographic imaging
transform sound reproduction across multiple genres w/ more textures, flat natural realism and smooth bass warmth
legendary mid response, ethereal highs and live-concert style delineation between instruments vocals and percussion
pristine silkscreen, carefully curated screened and twice tested + free postage!
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full gm conductance test 90/90 % gm (65 good) + important life test pass! (life check = key longetivity indicator)
our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test + leak/short check
mutual gm conductance scores are the ability to transfer current ~ especially important for push-pull preamps
also supplier double checked for conductance via supplier tv7 / hickok 539c for unparalleled accuracy
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we also pride ourselves on a proprietary complimentary value-added complete refurb screening deox process
give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important)
ships well packed worldwide
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authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
including limited special editions + rare true-nos sealed box + pinched waist + high-resolution headphones