Siemens

Siemens E88CC 6922 Preamp Tubes Matched Pair Original Box - Munich 1963/64 - NOS

$358.00 USD

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Perfect matched & balanced pair of vintage Siemens E88CC/6922 Audio Tubes - Munich 1963/64 - Super Strong NOS

Tubes Summary

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 1960s Siemens tone is considered the "reference sound" for serious classical listeners who need to upgrade the sound quality at phono stage.

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 E88CC 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 E88CC tubes, Siemens E88CC's produce a warmer, smoother and more musical sound. To see how the two German titans in vintage tube sound compare to each other, please check out our full sound review of a 1963/64 Matched Pair of Telefunken E88CC tubes here: https://www.ebay.com/itm/266376181581

Professional Sound Evaluation

The pair worked wonderfully and sounded terrific in our professional studio setup for monitoring.

- Input: Cambridge Audio CXC V2 dedicated CD transport + Schiit Audio Bifrost 2 Multibit DAC

- Amplification: Liquid Platinum Tube Amplifier by Alex Cavalli

- Output: Focal Clear MG Pro open-back headphones

Our full tube sound review was written 100% based on the actual listening experience while this pair of tubes were running in the system described above.

Professional Tube Testing

Both tubes tested Super Strong NOS (120%+ mutual conductance) on a Mercury 2000 tube tester with the following result (both in mutual conductance in uMhos and in percentage of the nominal value):

Tube 1(left): 16,000/16,100 (128%/129%)

Tube 2(right): 15,500/16,000 (124%/128%)

Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000's rated mutual conductance (nominal) for new tubes is 12,500. Test result can also be seen in the pictures. In case you wonder what all these numbers mean to your sound experience, it's actually quite straightforward: mutual conductance directly translates to a tube's ability to amplify sound so the higher the numbers the better.

No shorts, gas grid leakages or microphonics.

Appearance & Cosmetic condition

Despite some loss of paint on one of the tubes, this pair overall is in great cosmetic condition. The 3-line Munich date codes etched on the glass are visible on both tubes although you may need to look closer to see them completely:

Tube 1(left): A0 1# 3C (A0 = E88CC, 1# = 1st gen. Munich production = 1960s, 3 = 1963, C = March)

Tube 2(right): A0 1# 4I (A0 = E88CC, 1# = 1st gen. Munich production = 1960s, 4 = 1964, I = September)

Packaging

This pair of tubes will be packaged in NEW reproduction Siemens tube boxes, secured by a hand-made paper ribbon (by courtesy of Soundlumia.)

Shipping Policy

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- Orders ship within 24 - 48 hours