Description

illuminate your stereo, preamp, or tube mic w/ an audiophile classic! siemens germany are the crown jewel of any collection siemens are the top sonic echelon, professionally graded as one of the lowest distortion tubes ever made, pure clarity kings! elevate your sound with siemens holographic vocal depth and natural effortless pickup response, reference grade tonality w/ transparent musicality and phenomenal detail, known for incredible bass kick and clear highs, pleasant and euphoric legendary 1960s production has a deep resolution extension and subtle warmth, pure organic imaging revered by audiophiles neutral sound reproduction w/ sparkley luminous resolve, less colored than heerlen and more bite and traction to your tone several in stock w/ authentic 1960s production codes of a01# and complimentary authentic siemens tube box included add fidelity to your preamp today, try them in the position / application that sounds best to you, 6922 equivalent carefully curated selected authentic collectibles, twice tested for accuracy! phono audio mic grade full mutual conductance gm test 111/112 % mutual gm (65% good) + life test pass! (life check = key longetivity indicator) + gas and leak/short check all tubes also undergo a complimentary value-added complete refurb screen and deox process full sound auditioned w/ closed back ultra high resmonitors and aira preamps = noise free + no microphonics give several sessions or up to 100+ hours w/ your specific amps voltage to settle in (break-in is important) ships fast well packed worldwide + free postage! authentic vintage hifidelity audiophile / preamp / mic tube curation by caliacoustics see our official site! reserve/request pricing options and new arrivals + limited special editions + rare true-nos sealed box + pinched waist + high-resolution headphones 1) holographic sound reproduction (amperex usa + telefunken / siemens germany + mullard gt britain + heerlen holland) 2) long-listen full frequency w/ pleasant extension (heerlen holland + siemens germany + mullard gt britain + tesla czech) 3) natural organic tone w/ flat mid band response (amperex usa + telefunken / siemens / valvo germany + mullard mitcham) 4) precision bass w/ depth and lush sonic resolve (heerlen holland + siemens / valvo germany + ei yugo + tungsram hungary) 5) warm musical dynamic sound reproduction (amperex usa / heerlen + siemens germany + mullard blackburn + bugleboy) 6) clarity w/ layered detail and subtle tone compression (telefunken / lorenz germany + tungsram hungary + tesla czech)