SIEMENS ECC83 / 12AX7 — Matched Quad 4 Pcs
Laboratory Verified
Made in Germany
Top Ring Getter
New in White Box
Amplitrex AT1000 Tested
Available is a high-performance matched quad (4 Pcs) of Siemens ECC83 12AX7 twin triodes, legendary for their precision and German engineering. These genuine valves feature the classic Grey Plate and Top Ring Getter construction. Renowned for their transparency, wide soundstage, and analytical detail, these Siemens tubes are the premier choice for audiophiles looking to elevate the performance of high-fidelity preamps and sensitive audio equipment.
All four units have been precision-screened on the Amplitrex AT1000 Advance Digital Tube Tester. Testing results are provided using the percentage method against factory design specifications (Ip = 1.2 mA / Gm = 1600 µMhos).
| Serial No. | Test Triode | Parameter Ip mAdc | Result Ip mAdc | % Ip | Parameter Gm uMhos | Result Gm uMhos | % Gm |
|---|---|---|---|---|---|---|---|
| 1205034 | T1 | 1.2 | 1.3 | 108% | 1600 | 1900 | 119% |
| T2 | 1.2 | 1.3 | 108% | 1600 | 1900 | 119% | |
| 1205025 | T1 | 1.2 | 1.3 | 108% | 1600 | 1900 | 119% |
| T2 | 1.2 | 1.4 | 117% | 1600 | 2000 | 125% | |
| 1205033 | T1 | 1.2 | 1.3 | 108% | 1600 | 1900 | 119% |
| T2 | 1.2 | 1.3 | 108% | 1600 | 1900 | 119% | |
| 1205024 | T1 | 1.2 | 1.4 | 117% | 1600 | 1900 | 119% |
| T2 | 1.2 | 1.5 | 125% | 1600 | 2000 | 125% |
About NOS Audio Tubes
Specializing in thoroughly screened and laboratory-tested quality vacuum tubes since the 1970s. Our inventory of approximately 300,000 valves is verified using professional equipment including the Amplitrex AT1000, Hickok 752a, and AVO Type 160.
Notice: Custom duties and taxes are the responsibility of the buyer in their country.
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