one of the highest ranked 12au7 ecc82 ever made! late 1950s dgetter black plate cbs hytron 5814a, matched grail vintage pair
these incredibly rare sought after tubes were made in the salem ma usa, when cbs purchased hytron, and only made up to 1961!
introduced in 1954, the premium 5814a is a top shelf premium 12au7 ecc82 upgrade, rugged low noise w/ high power at 175ma
often described by listeners as warm, smooth, and incredibly detailed, w/ pure tonal transparency, all without being clinical
these revered dgetter production have the most precious tube-era metallurgy and resolution, like a live-concert in realism
the legendary black plate carbide coating radiates heat better, reduces plate temps faster, and enhances tonal characteristics
intimate low-register dynamics, exquisite musical depth, and sweet imaging, w/ immersive reveal of complex passages
the colorful harmonics, expansive sound stage, and dimensional mid-bloom, all contribue to the collectibile cbs lore
2 x old stock matched cbs black plate 5814 w/ fair to nice 1957+/- silkscreens, and cbs boxes included!
+ complimentary value-added refurbish and deoxit process ~ one of a kind quality control
full mutual conductance gm test, several matched pairs left in stock:
pair1(sold): 109/110~110/109 % gm ~ pair2: 106/109~107/106 % gm ~ pair3: 102/94~102/92 % gm (65 % min good)
pair4: 90/110~110/86 % gm ~ pair5: 70/91~70/88 % gm ~ pair6: 90/91~82/80 % gm (65 % min good)
our high power output test applies up to 250v, more than many other testers, and simulating real circuits
+ important life test pass (a key longetivity indicator) + impeccable leak short gas check
give several sessions (up to 150+ hours) w/ your specific amps voltage to fully cure / break-in
ships fast well packed worldwide w/ free economy postage!
~ authentic hifidelity vintage audiophile preamp tube / power tube / mic tube curation by caliacoustics ~
see our official site for new arrivals + reserve/request options + limited special editions
+ rare true-nos sealed box + pinched waist + high-resolution headphones