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Mullard 6922 = E88CC Matched Pair - 10M Series- Blackburn 1961 - Strong NOS

Mullard 6922 = E88CC Matched Pair - 10M Series- Blackburn 1961 - Strong NOS

Regular price $674.00 USD
Regular price Sale price $674.00 USD
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Perfect matched pair of vintage Mullard E88CC 6922 audio tubes - 10M Series - Blackburn 1961 - Elusively Rare

Product Summary

Draw up the curtain and let the spotlight in as this is exactly where these tubes deserve to stand. The Mullard 10M Series! Designed and built specifically for audiophiles with industrial-grade specs by the special high-end audio unit at both Blackburn and Mitcham factories (recall Philips' SQ but this is at a much higher caliber.) These tubes went through rigorous testing & screening processes according to the highest standards of the tube industry. Minimum 10K hours of heater life, matching triodes and near zero noise are just the beginning. The 10M Series was Mullard's official answer to the super high-end Telefunken E88CC tubes (CV2493, E188CC and CCa) and remains one of the very top choices for serious audiophiles and sound professionals. The only one problem (and there's no real solution to it) with these tubes is they are elusively rare as they were produced in very limited quantity and only in select years of production. Exclusively presented here by Soundlumia is a perfect matched pair of 10M Series from the 1960 Blackburn production. Welcome to the concert hall of 10M Series!

Sound Characteristics

For those who feel the Mullard E88CC tubes are less analytical than their German counterparts, the 10M Series proves that the best tube can be both analytical and musical. One can almost say this is a better version of Telefunken CCa because you get the laser precision in detail retrieval of Telefunken tubes and the unmistakable British warmth in sound, which is NEVER found on Telefunken. Next, the holographic soundstage...another Telefunken "proprietary" feature is being seriously challenged here as well: 10M Series' presents a less curvy sound stage than Telefunken CCa without compromising the full 3D imaging. You hear everything right here like at a concert hall INSTANTLY and don't have to look for the harp sound in the corner (recall how many times you have done this with Telefunken tubes?) Now there's only one last thing needed to treat the Telefunken "thinness and hollowness". How about some expansive and forward midrange? But isn't that what Mullard does the best after all? It only gets better on the 10M Series: elegant,  gentle, calm, smooth and fluid.  

Any sound review on a Mullard tube without discussion of its "British warmth" would be incomplete. So we have dedicated a full paragraph to the comparison between the classic Mullard warmth and the 10M Series warmth. Recall how many times you feel the vocals on Mullard's get too warm it feels like heat right in your face? That is gone on 10M Series! The moment you turn on your music, the 10M warmth begins to release slowly (and of course surely) and gently flows through your ears, your veins, your bones and reaches your fingertips before you know it...and then it warms your heart. 

10M Series = the ultimate audiophile tube.

Lastly, recall the price tag of Telefunken CCa. 

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 (125%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos and percentage of nominal):

Tube 1 (Left):  17,500/17,200 (140%/139%)
Tube 2 (Right): 16,000/15,500 (128%/124%)

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 would 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 stronger.

Appearance & cosmetic condition

We treasure this pair also because of the pristine condition of both tubes - nearly 100% of the paint and lettering are well retained. The acid-etched Mitcham date codes are a bit fainted but the factory and year digits are visible on both tubes:

B1?? (B = Blackburn, 1 = 1961, ? = Unknown month, ? = Unknown # of week of the production month) 


This pair of tubes will be packaged in the new white 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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