1) holographic warm sound reproduction (telefunken + siemens germany + philips amperex + mullard gt brit) 
2) pleasant long-listen full frequency extension (siemens germany + mullard gt brit + valvo heerlen + brimar gt brit ) 
3) natural tone w/ flat organic response (telefunken / valvo / siemens germany + toshiba japan + tungsram hungary)
4) precision bass w/ depth and lush resolve (siemens / valvo germany + amperex heerlen + mullard gt brit)
5) musical dynamic sound reproduction (philips amperex + mullard gt britain + valvo germany + ei yugo)
6) clarity w/ layered detail and bass compression (telefunken / lorenz germany + tungsram + tesla czech)
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a top sonic echelon audiophile classic! pure dazzling precision transparency musical extension and bass air euphony
the revered tone of e188cc holland are legendary and sought after by audiophiles, and a bit richer resolve than usa variety 7308
these special quality comms grade selections were screened for mission critical apps requiring 10k hour long life + lowest noise
heerlen is famous for their 'dutch house' lively resolve, a sparkley cymbal-style sonic aftertaste bringing life to many genres
the e188cc sound stage is incredibly expansive and euphoric, popular in a variety of preamps mics stereos vocal apps and more
the low bass register on e188cc is also better than e88cc due to its curve and high power properties (see data sheets attached!)
the noise control on e188cc is also better than e88cc and is less prone to microphonics and vibration, especially important
the special quality silkscreen is visible and these oe boxed collectibles have a 1969/1971 production code of ⊿ 9k3 /⊿ 1f3
immerse yourself in live-concert realism from one of the best tone-extension-warm years sonically in the 6dj8 ecc88 family
collectible quite rare pair of special editions w/ unparalleled quality control and vinyl style fidelity in audio circuits
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full nos conductance test match 118/120~116/116 + useful life test pass! (a key longetivity indicator)
our unique gm output test applies 225 vdc simulating actual operations w/ filtered dc + leak short gas check
mutual gm conductance scores relate to the ability to transfer current, especially important for push pull amps
twice tested! supplier checked for conductance via tv7 and audio circuit auditioned for noise free operation
we pride ourselves on a proprietary complimentary value-added refurb screening deox proces
always give 100+ session hours w/ your amps specific voltage (break-in is important)
ships fast well packed + free economy worldwide postage
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authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
also see our official site for reserve/request options and rare limited run collectibles
+ special editions + rare true-nos sealed box + pinched waist
+ high-resolution headphones + premium vocal stage / studio mics
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6dj8 7dj8 6922 7308 / ecc88 pcc88 e88cc e188cc cca
12ax7 12at7 12at7wa 12au7 12au7wa 12bh7 / ecc83 ecc82 ecc81 e82cc e83cc
6bq5 6au6 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 ef804 e180cc e80cf gz34 (6cg7/6fq7 soon)