Description

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) elevate your sound with siemens holographic depth and natural effortless pickup response, reference grade tonality transparent musicality and phenomenal detail, known for incredible bass kick and clear highs, pleasant and euphoric legendary 1967 production has a deep dazzling extension w/ subtle rich warmth, organic imaging revered by audiophiles neutral vocal and sound reproduction w/ sparkley resolve, less colored than heerlen and more bite and traction to your tone illuminate your stereo listening or mic pre w/ an audiophile classic! siemens germany are the crown jewel of any collection the top sonic echelon, professionally graded as one of the lowest distortion tube brands ever made, pure clarity kings authentic '67 production codes: a37l ~ a37k, 08102 ~ 08108 batch munich germany w/ authentic siemens boxes full conductance test 124/124~118/120 % mutual gm (65%)+ life test pass! (life check = key longetivity indicator) our special gm output test applies real world 225vdc voltages w/ filtered dc, plus an impeccable gas test and leak/short check plus full sound auditioned w/ closed back ultra high resmonitors and aira preamps = noise free + no microphonics we pride ourselves on a proprietary complimentary value-added complete refurb screen and deox process 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 options + new arrivals + limited special editions + rare true-nos sealed box + pinched waist