1963 mullard bva special editions are the top sonic echelon for warm holographic sound reproduction w/ rich dynamic bass
a legendary 6dj8! so popular they were copied by raytheon engineers in 1962! right down to the blackburn cross getter
an audiophile classic, like a live pub concert in your living room, especially incredible for vocal playback even in mics
authentic ga2 series blackburn production are hard to find early builds w/ a richer more intimate low-register reveal
quality precious metallurgy w/ thick getter flashing up top, sparkley yet soft highs are pleasant and revered by listeners
these collectible vintage sonic gems sit in the mids and were only made 1-2 years w/ special labels and include mullard boxes
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full conductance test 84/82 ~ 75/65  % gm (65good) + life test pass! (life check = key longetivity indicator)
mutual gm output applies real world 225vdc voltages w/ filtered dc + an impeccable gas test and leak/short check
gm conductance is the ability to transfer current, especially important for push-pull preamps
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we also pride ourselves on a proprietary complimentary value-added refurb screening deox process
give 100+ session hours w/ your specific amps voltage to settle in (break-in is important)
ships well packed worldwide w/ free postage!
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authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
see our offical site for reserve and request options + limited run rarities, part list below
including special editions + rare true-nos sealed boxes + pinched tight 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 12bh7a / ecc83 ecc82 ecc81 e82cc e81cc
6bq5 6au6/a 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 e80cf ez81 ecc85 e180cc gz34