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amperex pq usa 6922 are legendary, revered for their expansive detail, tone extension and euphoric clear sound stagesought after by audiophiles, the rich warm stage ambience highlights a variety of vocal / singer types and genresthe immersive involving imaging brings live-concert realism to your listening experience and the bass has depthtake your musical experience to a higher level of engagement w/ trueholographic sound reproductionthe incredibledelineation of instruments and percussion delivers fidelity intimacy and high resolutionpremium quality tubes are transparent and capture realistic highs, w/ a sweet sparkley aftertastethe rich mid-band euphony is pleasant to listen to and is the top sonic echelon by listeners worldwideoften compared to heerlen hollands sweetness, these shine w/ more clarity and taller 3-dimensional imaging~nice pq silkscreens, 1965/1966 production w/ 7l*5a / 7l*6l etch codes and 65-13 / 67-13 batch codesauthentic usa hicksville ny usa, and amperex boxes are included + free postage~full conductance test, balanced106/105 ~ 108/109%mutual gm(65) +useful life test pass!key longetivity indicatorour special gm output test appliesreal world225vdc voltages w/ filtered dc, plus an impeccable gas test and leak/short check
mutual gm conductance scores are the ability to transfer current ~ especially important for push-pull preampstwice gm tested and matched,13.1/12.6 ~ 13.1/12.6 gm micromhoswhere 11k is nos and 7k is good~we pride ourselves on a proprietaryvalue-addedcomplete refurb screening and deox processall our tubes are carefully curated, twice tested for unparalleled accuracy+ phono grade mic certified low noise
give 100+ session hours w/ your specific amps voltage to fully settle in (break-in is important)ships well packed worldwide w/ plain or branded boxes~authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacousticsseeour official site! inventory list below includingtrue-nos sealed box rarities
limited-run special editions and pinched waist varieties
also high-res headphones + premium vocal stage/studio mics
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6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cca
12ax7 12at7 12au7 12bh7 / ecc83 ecc82 ecc81 e82cc
6bq5 6au6a 6267 6ca7 6ca4 6aq5 / 6v6 6l6 6sl7 6sn7 5y3 5u4 5ar4
5814 5751 5965 6189 6201 7062 7189 / cv2492 cv4004 cv455 cv4085
el34 el84 ef86 ef94 ez81 ecc85 e180cc gz34 (ef804 soon)
