Siemens 6189 12AU7 ECC82 Preamp Tubes Matched Pair - Munich 1968/69 - Near NOS

Perfect matched pair of vintage Siemens 6189 Tubes - Munich 1968/69 - One tube w/ Philips SQ label - Near NOS - Very Rare Product Summary Known for their superb musicality, ultra low noise and superb performance, 6189 tubes remains among audiophiles' top choices of 12AU7 tubes for serious listening. And this pair is even more special because one of the tubes is labeled Philips SQ 6189 w/ Siemens Munich date code.  Sound Characteristics  The airy and transparent sound produced by these vintage Siemens tubes has been unrivaled even to this day. The magically extended yet never tizzy highs, coupled with the slightly focused upper mid-range, deliver a clear presentation of the entire frequency spectrum, completed by the precise and deep controlled bass. And the most defining sound characteristic of Siemens tubes is their ability to retrieve the deepest levels of detail in sound, and these hidden sonic layers can go a long way to revealing the subtle ambient clues that help complete b