Soundlumia

Amperex USN 6922 E88CC D-getter Pinched Waist Matched Pair - USA '59 - NOS

Name: Amperex USN 6922 E88CC D-getter Pinched Waist Matched Pair - USA '59 - NOS
Brand: Soundlumia
SKU: 266947778609
Price: 1181.75 USD
Availability: InStock

$1,181.75 USD

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Soundlumia's Opinion

Built and tested according to military specs of the US Navy, Amperex USN-CEP is the most reliable 6922/E88CC tube known to the world: its quality is more than premium, although it doesn't carry the aweing PQ label like its more expensive siblings do; its performance is superb and in fact very few tubes in this price range can claim to be stronger; its low noise should only by judged by the most experienced sound experts because we are talking about the very tube built for and certified by US Navy for mission-critical communication devices; its sound signature is phenomenal (we don't use this word very often to describe tube sound) and many audiophiles consider the "Holy Grail" (1975's Reflektor 6N23P) its only possible upgrade path.

The clarity and sound detail on USN 6922's are second to none. They deliver the same resolution and grip you get from the best German E88CC's but feel less "clinical", for the lack of a better word to describe what Telefunken E88CC's "ultimate clarity" means. These tubes have a clean, incisive presentation, but are also euphonic and musical. Like the Holy Grail's they put all the differing and competing attributes together in one excellent package. As a result, there's no one area they are weak in. The sound stage is not only wide but also deep so every listening experience feels like at a live concert. The instrument separation is not done as beautifully anywhere else, as one would expect from tubes this quiet.

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

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:

Tube 1:

Measured transconductance(GM): 13/12.98 mA/V - 104%/104% (100% = 12.50 mA/V)

Measured plate current(IA): 18.576/18.569 mA - 124%/124% (100% = 15 mA)

Tube 2:

Measured transconductance(GM): 12.76/13.44 mA/V - 102%/108% (100% = 12.50 mA/V)

Measured plate current(IA): 17.564/19.544 mA - 117%/130% (100% = 15 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & cosmetic condition

Beside the world-class sound characteristics, we treasure this pair because the pristine condition the two tubes are in - nearly 100% of the paint is intact, and the identical Amperex New York date codes etched on glass are perfectly visible:

7L4 *9E (7L4 = change code, * = Amperex New York factory, 9 = 1959, E = May)

7L4 *9F (7L4 = change code, * = Amperex New York factory, 9 = 1959, F = June)

Shipping Policy

- US Shipping: Flat-rate USPS Ground Advantage (upgradable to flat-rate USPS Priority or FedEx 2nd Day for expedited delivery.)

- International Shipping: Flat-rate USPS First Class International (upgradeable to flat-rate UPS Worldwide Expedited or DHL Express for expedited delivery.)

Due to logistic issues with destination country's postal service, we are unable to ship to the following countries using USPS First Class: Armenia, Chile, China, India, Latvia, Mauritius, Mexico, Serbia, Slovenia, Tuvalu. If you are a buyer from one of these countries, you must contact us to arrange shipping prior to purchase.

- Same day shipping: Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day.

- Combined shipping available - request invoice for total before making payment or receive shipping credit after order ships.

Return Policy - Please READ carefully

Returns are acceptable if we made a mistake by delivering you wrong or defective products. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation TWICE: before they are approved for listing AND before we ship them to customers. So the "defective item" case doesn't exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes are faulty and we will open disputes with eBay. Sound experience is very subjective and we do NOT accept returns because you do not like the tube's sound signature or because you changed your mind about your purchase. Please contact us to work things out before submitting return requests claiming "item is defective" or "item not as described" or "just didn't like it" or "changed my mind."

Tube rollers abusing the return system will be reported to eBay immediately and negative feedback will be left to your account - that's guaranteed. We have already opened several dispute cases to report abusive buyers and eBay has always ruled in our favor. International buyers who request return or refund claiming your country's import duties or sales tax/GST/VAT are too high will be reported to eBay immediately for dishonesty and will be permanently blacklisted from purchasing from Soundlumia. We are committed to working closely with eBay to help rid the marketplace of dishonest, unjust, unreasonable, abusive buyers that are detrimental to the vintage tubes market and the audiophile community.