1) holographic sound reproduction (amperex usa + telefunken / siemens germany + mullard gt britain) 
2) long-listen full frequency pleasant extension (heerlen holland + siemens germany + mullard gt britain) 
3) natural organic tone w/ flat response (amperex usa + telefunken / siemens / valvo germany)
4) precision bass w/ depth and lush resolve (heerlen holland + siemens / valvo germany)
5) musical linear sound reproduction (amperex usa / heerlen + siemens germany + mullard gt britain)
6) pure clarity w/ layered detail and subtle compression (telefunken / lorenz germany + tungsram)
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amperex pq dgetter 6922, audiophile crown jewels! revered harmonic clarity produces immersive vocals chords + instruments
legendary natural transparency, liquid sound reproduction and holographic flat euphoric response is revered worldwide
considered the most magical sound ever made w/ the most precious tube-era metallurgy warmth and sparkley resolve
this expansive stage reminds us of heerlen holland yet w/ higher resolution and more 3-dimensional clarity, incredible highs
phenomenal bass depth has a dynamic quality only found on these limited run types, the best pinched waist alternatives!
the top sonic echelon, see the attached sound curves which proves why these limited runs have such pin-point accuracy
authentic hicksville 7l4 ny * etch code usa 1959 or 1960 available! premium quality 'pq' shield silkscreen is quite pristine
legitimate philips amperex box included (singles / pairs / quads available) + plus free postage!
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finding an audio grade e88cc can be daunting! they are prone to microphonics and most sellers dont test them in a phono stage
all our tubes undergo a proprietary value-added screen and careful deox process = audio grade / mic certified / phono ready
full sound auditioned w/ closed back ultra high res monitors + aira preamps, always handle e88cc/6922 with care
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full conductance test w/ pristine tight balance: 13,200/13,100 via mutual gm micromhos (photos attached)
nos/nib nominal spec starts at 11,000 per the manual and good tubes start at 7,000 + gas/leak/short check pass
mutual gm conductance scores are the ability to transfer current ~ especially important for push-pull preamps
twice tested! all tubes are double checked for mutual gm and undergo a very useful life test ~ a key longetivity indicator
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give several sessions or up to 100+ hours w/ your specific amps voltage to settle in (break-in is important)
ships well packed worldwide, several in stock
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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
also high-resolution headphones + premium vocal stage and studio mics
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6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cca
12ax7 12at7 12au7 12bh7 / ecc83 ecc82 ecc81 e82cc e81cc
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 e80cf gz34 (ef804 soon)