1950's top sonic echelon, vintage black plate cbs dgetters are revered by audiophiles worldwide for their incredible tone!

the high resolution sound stage reproduces sound like no other, 90-degree dgetter production w/ special glass imprints in base

grail ranked warm open expansive tone, intimate fidelity, immersive lush depth, balanced dynamics, and subtle sweetness

the 5814a is a top shelf premium 12au7 ecc82, long-life low-noise ruggedized 12au7wa equivalent at 175ma

full mutual conductance test, pristine: 100 % gm (65 % min good)

+ life test pass (longetivity) + leak short gas check + complimentary refurbish and deoxit process!

give 100+ session hours at your specific amps voltage to fully cure / break-in

ships fast well packed worldwide w/ free economy postage!

~ authentic vintage hifidelity audio / mic / power / preamp tube curation by caliacoustics~