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Siemens

Siemens E188CC 7308 A-Frame Matched Pair in Original Boxes- Munich G6 1K - NOS

Siemens E188CC 7308 A-Frame Matched Pair in Original Boxes- Munich G6 1K - NOS

Regular price $544.50 USD
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Product Summary

Stronger than time! This is the classic beauty in sound, admired by audiophiles for over 50 years and will still be our top choice in the next 50 years. The E188CC/7308 (enhanced E88CC) version, with more rugged build, minimum 10K hours heater life and further enhanced sound qualities, is even more sought after by critical listeners and tube enthusiasts. 

Sound Characteristics 

The airy and transparent sound produced by the 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 E188CC 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 E188CC tubes, Siemens E188CC's produce a warmer, smoother and more musical sound. 

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

No shorts, gas grid leakages or microphonics. 

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): 16,800/16,000 (134%/128%)
Tube 2(right): 16,500/16,000 (132%/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. 

Appearance & Cosmetic condition

This pair is in excellent cosmetic condition with at least 90% of the paint and letter well preserved. The IDENTICAL 2-line Munich date codes printed on metal tag inside tube glass is perfectly visible:

G6 1K (G6 = E188CC/7308 production gen #6, 1 = 1971 or rev. 1, K = November)

Packaging

This pair of tubes will be packaged in the ORIGINAL Siemens E188CC tube boxes, secured by a hand-made paper ribbon (by courtesy of Soundlumia.) 
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