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Philips E88CC D-getter Matched Pair Valvo Telefunken Labels - Holland 1958 - NOS

Philips E88CC D-getter Matched Pair Valvo Telefunken Labels - Holland 1958 - NOS

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Perfect matched pair of vintage Philips E88CC 6922 D-getter Audio Tubes - Valvo + Telefunken Labels - Heerlen, Holland 1958 -  Strong NOS - Super rare tall glass build

Product Summary

The "textbook Heerlen sound" has been referenced in several Soundlumia listings of Amperex Holland/Philips tubes, and many tube sound enthusiasts asked what that all means. So this is the answer: the late 1950s and very early 1960s tone, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex/Philips/Valvo/Miniwatt (and now even Telefunken!) tubes to be made in the years to come, the timeless Philips radio tone that many of us grew up listening to. 

Sound Qualities

Made in Heerlen, Holland, these tubes naturally share all the remarkable characteristics of the Philips house sound -  the "textbook" Heerlen midrange presentation that 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. And with the super rare D-getter, which was only available from the 1950s' tubes, you get extra smoothness, ultra clarity and taller imaging. Instrument separation on these is nearly on par with the Amperex PQ (Premium Quality) tubes - you should hear absolutely nothing but the soul of your music and all of it when you use these tubes. 

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) and tightly matched on a reliable and recently calibrated Mercury 2000 tube tester with the following result (mutual conductance in uMhos and percentage of nominal):

Tube 1: 14,900/14,900 (119%/119%)
Tube 2: 14,800/14,000 (118%/112%)

Good tubes start around 7000 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. 

Appearance & cosmetic condition

The Valvo-labeled tube stands out aesthetically among the vintage tubes for its pristine cosmetic condition, while most of the paint and lettering on the Telefunken-labeled tube have worn off , but traces of the Telefunken diamond logo is still visible, and the Heerlen date codes etched on glass are perfectly visible on both tubes:  

Valvo-labeled tube: 7L4 delta 8L (7L4 = E88CC production #4, delta = Heerlen, Holland, 8 = 1958, L = December)
Telefunken-labeled tube: 7L3 delta 8E (7L3 = E88CC production #3, delta = Heerlen, Holland, 8 = 1958, E = May)

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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