1) holographic warm sound reproduction (leading brands: telefunken + siemens germany)
2) pleasant long-listen full frequency extension (leading brands: siemens germany + mullard gt britain)
3) natural tone w/ flat response mid-range (leading brands: telefunken + valvo + siemens germany)
4) precision bass w/ depth and resolve (leading brands: siemens + valvo germany + amperex heerlen)
5) musical linear sound reproduction (leading brands: amperex heerlen + siemens germany + mullard gt britain)
6) pure clarity w/ layered detail compression (leading brands: telefunken + lorenz germany)
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we pride ourselves on a proprietary complimentary value-added complete refurb screen and deox process, plus free postage!also see our official site for discounts, new part numbers including true-nos sealed-box rarities, and reserve/request options
finding audio grade 6922/e88cc can be daunting! most sellers dont check them for phono grade or low noise mic certify them
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an audiophile crown jewel, mullard gold pin blackburns are rare collectibles known for their holographic liquid dynamics
this selected screened pair for general electric brand has original silkscreens visible and even includes fragile original boxes
these gold pin 1968 production 6922 (e88cc equiv) are premium 6dj8 ecc88 w/ long life 10k hours and more mid extension
often confused w/ mitcham, the blackburn series has more bass response and tone personality, a sign of the times in 1968!
few can capture mullards rich warm refined holographic sound stage w/ lush resolve ~ a must for vocals
revered worldwide by audiophiles, hifidelity preamps stereos and mics, carefully curated twice tested pair
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full conductance test 106/105~105/105 % mutual gm (65%)+ 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 and leak/short check
gm scores relate to current-transfer ability, whereas gain relates to signal amplification ~ a difference based on actual voltages
full sound auditioned w/ closed back ultra high resolution monitors and aira preamps = noise free + no microphonics
give several sessions or up to 100+ hours w/ your specific amps voltage to fully cure (break-in is important)
ships well packed worldwide ~ authentic vintage hifidelity audio curation by caliacoustics