old stock 6ca7 el34 preamp audio tube by matsu japan, legendary dual disc edition w/ twice the sonic horsepower
carefully curated 3d code, revered tone by audiophiles worldwide, often directly compared to mullard xf series sonically!
the tube-era british supplied expertise + tooling via 'transfer of technology' resulted in several critical audiophile advantages:
...same anodes, micas, electrode geometry, glass envelope, spot welding, grid wire spacing and cathode processing chemistry!
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take your listening experience to a higher level of 3-dimensional engagement w/ immersive holographic imaging
these vintage types are also coveted for their warm live-concert style delineation of instruments vocals and percussion
tune and transform your sound reproduction across multiple genres w/ more realism and delicate full-register intimacy
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full gm conductance test 101 % gm (65) + important life test pass! (key longetivity indicator) always rebias!
our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test + leak/short check
mutual gm conductance scores are the ability to transfer current ~ especially important for push-pull preamps
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we pride ourselves on a proprietary complimentary value-added complete refurb screening deox process
give several sessions or up to 100+ hours w/ your specific amps voltage to settle in (break-in is important)
ships well packed worldwide + free postage! several more in stock w/ dual discs
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authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics
see our offical site for reserve/request options + part number list below
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
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 e180cc gz34 (ef804 soon)