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Siemens ECC82 12AU7 Long Plates Matched Pair - Lorenz Label - Munich 1960s - NOS

Siemens ECC82 12AU7 Long Plates Matched Pair - Lorenz Label - Munich 1960s - NOS

Regular price $288.75 USD
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Soundlumia's Opinion

Stronger than time! This is the classic beauty in sound, admired by audiophiles for almost 60 years and will still be our top choice in the next 60 years. Particularly, the early '60s Siemens tone is considered the "reference sound" for serious classical listeners who need to upgrade the sound quality at phono stage. 

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 ECC82 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 building a truly 3D holographic presentation. While as quiet and analytical as the best Telefunken ECC82 tubes, Siemens tubes produce a warmer, smoother and more musical sound. 

Professional Tube Testing

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result: 

Tube 1:

Measured transconductance(GM): 2.32/2.43 mA/V  - 105%/110% (100% = 2.20 mA/V)
Measured plate current(IA): 9.797/9.94 mA  - 93%/95% (100% = 10.5 mA)

Tube 2:

Measured transconductance(GM): 2.31/2.19 mA/V  - 105%/100% (100% = 2.20 mA/V)
Measured plate current(IA): 9.505/9.175 mA  - 91%/87% (100% = 10.5 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance and cosmetic condition

Silkscreen: 95% - 100% (Pristine)

Date codes: 

K64 ‡6C (K64 = ECC82 long plates gen #4, ‡ = Munich, 6 = 1966, C = March)

K64 8D (K64 = ECC82 long plates gen #4, ‡ = Munich, 8 = 1968, D = April)

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