Skip to product information
1 of 9


Telefunken E88CC Matched Pair Ulm 1964 B Series - ◇ + Red "b" on Bottom - NOS

Telefunken E88CC Matched Pair Ulm 1964 B Series - ◇ + Red "b" on Bottom - NOS

Regular price $538.00 USD
Regular price Sale price $538.00 USD
Sale Sold out
Shipping calculated at checkout.
Tubes Summary

Behold the illumination at night, write down how your music sounds the moment these tubes start glowing and keep your notes forever. The finest in the fleet, Telefunken E88CC is unequivocally the supreme commander of the entire E88CC/6922 tubes family. This gorgeous pair is from the early 1960s' Ulm, Germany production - the most sought after Telefunken sound. 

Sound Characteristics

Like any other Telefunken tubes, these E88CC'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. 

Appearance & cosmetic condition

Beside the world-class sound characteristics, we treasure this pair also because the near pristine condition of inscriptions on the tubes. Ulm factory date codes are 100% visible on both tubes: 

U9014103 (U = Ulm, Germany, 4 = 1964

And of course the diamond mark on bottom - the symbol of the best sound one can ever find on E88CC's.

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 Strong NOS (110%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance both in uMhos and in percentage of nominal):

Tube 1: 16,100/16,250 (129%/130%)
Tube 2: 15,700/16,200 (126%/130%)

Good tubes start around 7,000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and 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 would mean to your sound experience, it's actually quite straightforward: mutual conductance directly translates to tube's ability to amplify sound so the higher the numbers the stronger. 


This pair of tubes will be packaged in NEW reproduction Telefunken tube boxes, secured by a handmade paper ribbon (by courtesy of Soundlumia.)
View full details