1970 mullard copper necks are the top sonic echelon for rich holographic sound reproduction and dynamic bass kick
only made 1-year, these rare limited-runs feature a dazzling boosted personality, an audiophile classic legendary 6dj8 ecc88
like a live concert in your living room, especially incredible for vocals and percussion playback or tube mic production
the highs are sparkley and resonant w/ a liquid rich resolve which these blackburn gt britain production are known for
quality precious tube-era metallurgy w/ thick getter flashing up top, boxed originals w/ no break-in flashing (important)
the crown jewels of any collection, these rca selected tubes have pristine silk screens and authentic british build codes:
1970 production blackburn gt britain: 72-13 print / ga3 b0h3 etch
complimentary mullard and oe rca box included, ships w/ free postage!
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full gm conductance test: 82/110 % gm (65good) + life test pass! (key longetivity indicator) better for mono apps+mics
our gm output test 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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all tubes have been sound checked in a sound studio w/ ultra high resolution headphones and premium aira preamps
we also pride ourselves on a proprietary complimentary value-added refurb screening deox process!
give 100+ session hours w/ your specific amps voltage to fully cure and settle in (break-in is important)
ships well packed worldwide
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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, parts 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 (ef804 soon)