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Valvo E88CC = 6922 = CCa Tubes D-getter Matched Pair - Holland 1960 7L5 - NOS

Valvo E88CC = 6922 = CCa Tubes D-getter Matched Pair - Holland 1960 7L5 - NOS

Regular price $430.00 USD
Regular price Sale price $430.00 USD
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Sound Sample:

Perfect matched & balanced pair of 1960 vintage Valvo Heerlen E88CC 6922 audio tubes D-getter and gold pins  - Made in Holland - Strong NOS - Super Rare

Product Summary

The "textbook Heerlen sound" has been referenced in several Soundlumia listings of Amperex Holland E88CC/6922 tubes, and many tube enthusiasts asked what that all means. So this is the answer: the late 1950s and early 1960s tone, the timeless Philips radio tone that many of us grew up listening to, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex Holland/Philips E88CC tubes, including this gorgeous Valvo-labeled pair. Valvo was the Philips Germany division.

Sound Qualities

Made in Heerlen, Holland in 1960, these tubes naturally share all the remarkable characteristics of the "textbook" Amperex Holland house sound. The midrange presentation is transparent, natural and expansive, with a slight touch of warmth that illuminates your music. Bass is deep and well controlled and the accuracy feels very similar to the high end German E88CC's. Sound separation and clarity on these are nearly on par with the Amperex PQ (Premium Quality) tubes - you should hear absolutely nothing but the pure soul of your music and all of it when you use these tubes. 

And what differences does the D-getter make on these? The textbook sound refined: cleaner instrument separation, smoother top end extension and taller imaging. 

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%+ mutual conductance) and tightly balanced on a reliable Mercury 2000 tube tester with the following result (mutual conductance value both in uMhos and in percentage of nominal):

Tube 1 (left): 14,600/14,400 (117%/116%)
Tube 2 (right): 15,100/14,400 (121%/116%)

Good tubes start at 7,000 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 stronger. 

Appearance & cosmetic condition

This pair is extra rare because of the excellent cosmetic condition: at least 90% of the inscription is intact and perfectly visible, and the acid etched Heerlen date codes are perfectly visible:

7L5 delta 0E (7L5 = E88CC production #5, delta = Amperex  Heerlen, 0 = 1960, E = May)
7L5 delta 0C (7L5 = E88CC production #5, delta = Amperex  Heerlen, 0 = 1960, C = March)


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 ($35.00) DHL Express Worldwide for ALL countries.

 - Orders ship within 24 - 48 hours
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