Description
Perfect matched & balanced pair of vintage Amperex 6922 PQ audio tubes w/ D-getter and gold pins - Made in USA 1959 - NOS - Ultra Rare Soundlumia officially recommends Amperex PQ 6922 & 7308 USA White Print tubes to be used in phono preamps based on extremely positive feedback from our past and repeat customers around the world. Tubes Summary Our best seller is back in stock - the Amperex USA PQ White Label! This listing is for a tightly matched pair of d-getter tubes with identical date code from 1959, one of the best years of Amperex USA and and very rare to find today. We have recommended PQs to more than 15 wonderful patrons of the Soundlumia eBay store, who are enjoying these tubes in their class leading amplifiers from Audio Research, Ear, Schiit Audio and Cavalli etc. and raving about their unquestionable superiority in sound. Sound Qualities Among all the PQ tubes, the USA white print version (made in Hicksville, New York) is the most sought after by serious audiophiles and tube enthusiasts. They are as sweet and smooth as the Amperex Holland PQ tubes, with even better detail and very spacious sound stage, which offers an amazing birds eye view of the shape of your sound, so you know exactly how tall and wide the sound stage is. The tone is warm yet lively, mids are forward but also expansive like what you hear on their cousins from the Holland factory, bass is punchy but not heavy. We have recommended them to so many satisfied customers that we have given them a nick name sound purifier - the sound that comes from these tubes has absolutely no edginess, glassiness or harshness, and you hear nothing but the soul of your music and all of it. They are the best tubes to to put in the phono stage to purify your sound in my opinion. As to vocals, I have no further comment than that the best Mullards were actually sourced from Holland PQs (Made in Gt. Britain w/ Heerlen date codes) and USA PQs beat the Holland ones in vocals period. Listening to Righteous Brothers Unchained Melody through these PQ tubes should be on your bucket list, no matter what type of music you enjoy. At this level of the game, the USA PQs compete with the premium German E88CCs made by Siemens and Telefunken (other brands dont even come close), and always come ahead in midrange presentation and overall musicality, and they have the best value at this price. For comparison of sound characteristics, please feel free to check our listing of a pristine matched pair of 1962 Telefunken E88CCs here: https://www.ebay.com/itm/266264647552 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 NOS (100%+ nominal mutual conductance) on a Mercury 2000 tube tester with the following result (mutual conductance in uMhos): Tube 1: 13,000/13,500 Tube 2: 13,000/13,000 Good tubes start at 7000 and new tubes (incl. NOS/NIB) 12,500 - 13,000, and the Mercury 2000s 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, its actually quite straightforward: mutual conductance directly translates to a tubes ability to amplify sound so the higher the numbers the stronger. No shorts, gas grid leakages or microphonics. Appearance & cosmetic condition This pair of PQs are so rare because nearly 100% of the inscription (Amperex brand, Made in USA print and PQ logo) is intact. The identical Amperex New York factory date code etched on glass is perfectly visible on both tubes: *9K (* = Amperex New York, 9 = 1959, K = November.) Shipping Policy - Ship worldwide! Flat-rate shipping (USPS First-Class) within the US. - Same business day handling. Orders placed by 2:00PM US Pacific Time on weekdays are posted on the same day, otherwise the next business day. - Combined shipping available. Please request invoice for total before making payment or receive shipping credit after order ships. - Customers outside the US please pay extra attention: International shipping is through USPS First Class Mail International by default. Its the least expensive option (even cheaper than eBay International Shipping) but may take longer than other carriers. If you prefer to use a different carrier please contact us before you buy so we can get you the correct shipping rates. Return Policy - Please READ carefully First of all, returns are acceptable as long as you are reasonable. Soundlumia sets extremely high quality standard for the products we deliver. Tubes we sell are guaranteed to work because we run professional tests and sound evaluation before they are approved for listing AND before we ship them to customers. So the defective item case doesnt exist and please do not bother trying - this type of returns will NOT be accepted without proof that tubes do not work and we will open a dispute with eBay. Sound experience is a very subjective thing, and lets be real its not that easy to run into compatibility issues between amps and tubes (so that one wont fly, either.) Please contact us to work things out before submitting return requests claiming item is defective or item not as described. We would really appreciate your respect to the professional work we have done (sourcing, testing & matching tubes, evaluating tube sound, sharing our sound experience with you, packing and shipping) to make these wonderful vintage tubes available to you at reasonable prices. Secondly, if you are a tube roller looking to game the return system, Number One STOP. Soundlumias founder is a seasoned sound professional who has advised orchestras and music studios in sound production in USA for over two decades, and knowing sound is the minimum skill requirement of our team. No tricks here please. Abusive behaviors will be reported to eBay immediately and negative feedback will be left to your account - thats guaranteed. We have already reported several abusers and eBay has ruled in our favor the dispute cases. We are more determined than ever to continue working with eBay to help rid of these unprofessional, unjustified, unkind, unfair and unacceptable abuses that are detrimental to the eBay marketplace, the vintage tubes market and the audiophile community.
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