Description

1) holographic warm sound reproduction (leading brands: telefunken + siemens germany) 2) pleasant long-listen full frequency extension (leading brands: siemens germany + mullard gt britain) 3) natural tone w/ flat response mid-range (leading brands: telefunken + valvo + siemens germany) 4) precision bass w/ depth and resolve (leading brands: siemens + valvo germany + amperex heerlen) 5) musical linear sound reproduction (leading brands: amperex heerlen + siemens germany + mullard gt britain) 6) pure clarity w/ layered detail compression (leading brands: telefunken + lorenz germany) ~ illuminate your sound w/ an audiophile collectible crown jewel! truly the breath of life, ruler flat response, top sonic echelon this rare first edition build from the 1950s brings a level of liquid wet imaging not seen in any 1960s a01 variety (even cca) professionally ranked as one of the lowest distortion tubes ever made, full frequency pure clarity king w/ pin-point accuracy ~ often compared to telefunken, siemens tubes have less compression and more depth resolution w/ phenomenal mid-band images the top end is sparkley w/ no roll off and a nice sense of air, and the smooth mid range provides reference grade holographics the low-mids are warm involving immersive and lush, w/ a phenomenal euphoric finish for vocals instruments and percussion a very balanced uncolored harmonic sound stage... this neutral tone reproduction equates to linear musical clear transparency add fidelity to your preamp stereo or mic today, try in the position / application that sounds best to you carefully curated selected and twice screened w/ authentic complimentary siemens box + free postage! ~ full parameter amplification test 110/105% gm (65 % good) + useful life test pass (important longetivity indicator) our unique dynamic output mutual gm test applies 225 vdc simulating actual operations w/ filtered dc + leak short gas check gm scores relate to current transfer ability, especially important for push pull preamps ~ finding an audio grade e88cc/6922/cca can be daunting! most sellers dont check them for noise or phono grade / mic certified we pride ourselves on a proprietary complimentary value-added complete refurb screening deox process full studio sound audition process w/ high resolution closed back monitors, phono grade mic ready give 100+ session hours w/ your specific amps voltage to fully cure (break-in is important w/ vintage tubes) nice silkscreen w/ german white sideways printed code (pre etch version!)