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Telefunken ECC83 12AX7 Smooth Plates Matched Pair - Berlin 1964 - Same code -NOS

Telefunken ECC83 12AX7 Smooth Plates Matched Pair - Berlin 1964 - Same code -NOS

Regular price $364.00 USD
Regular price Sale price $364.00 USD
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Perfect matched & balanced pair of vintage Telefunken ECC83/12AX7 Audio Tubes - Smooth Plates  - Diamond Bottom - Berlin 1964 -  Strong NOS - Same date code - Extremely Rare

Product Summary

The "Crown Jewelry" ECC83 tube is here! If you've been seeking the reference tube sound then look no further. Designed for high end amplifiers and preamplifiers, Telefunken ECC83 tubes provide high level gain with ultra low noise and are unquestionably the vintage tubes sought after and treasured most by audio professionals and enthusiasts. 

Sound Qualities

Like any other Telefunken tubes, these ECC83's are very pleasant to listen to: liquid, euphonic, with a slightly warmer midrange than many other German tubes, which makes your sound experience smooth and non-fatiguing, and all that happens on a unbelievably realistic holographic sound stage, where everything feels bigger, wider and taller. Sound texture can be felt through infinite levels of details, laying on top of each other, both in depth and in width. So your quest for superb sound clarity can end right here. Lastly, it never gets old to say that no other brand is even close to these when it comes to low noise - Telefunken tubes are "extremely" quiet just as legend has it.

And the cherry on top for this pair: one of the tubes has the lovely green mark between the pins, meaning it was a  "select" tube that went through rigorous testing/selection process before its commercial release, and the sonic differences compared to the standard tube are cleaner imaging, more details and extra smoothness.

Professional Tube Testing

Both tubes tested NOS (100%+ nominal mutual conductance) on a reliable and recently calibrated Mercury 2000 tube tester with the following results for mutual conductance:

Tube 1: 1,200/1,150 (120%/115%)
Tube 2: 1,150/1,180 (118%/116%)

Good tubes start at 700 and new tubes (incl. NOS/NIB) 1,000, and the Mercury 2000 tester's rated mutual conductance (nominal) for new tubes is 1,000. Test results can 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 tube's ability to amplify sound, so the higher these numbers the stronger. No short, leakage or gas.

Appearance & Cosmetic condition

Beside the fantastic sound signature, we treasure this pair also because both tubes have 100% paint & lettering remaining and the identical Berlin date codes are perfectly visible on both tubes:  

B mp 01 (B = Berlin, mp = March, 1964, 01 = internal batch number)

And of course the diamond mark on bottom - the symbol of the best sound one can ever find on ECC83's.


This pair of tubes will be packaged in the new Telefunken reproduction boxes, secured by a handmade paper ribbon (by courtesy of Soundlumia.)

Shipping Policy 
- US Shipping: Flat-rate($5.50) USPS Ground Advantage for ALL states.

- International Shipping: Flat-rate ($20.00) USPS First Class International for ALL countries.

- Orders ship within 24 - 48 hours

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