Description
Perfectly matched & balanced pair of vintage Philips ECC88 6DJ8 audio tubes - NOS - Heerlen, 1963 - Same date code - Very Rare Sound qualities What a great decade for the legendary Heerlen tubes! You get the textbook Philips/Amperex Holland midrange presentation that is transparent, natural and expansive, with a slight touch of warmth that illuminates your musical world. The top end is super airy, smooth and nicely extended like one would expect from the best Siemens tubes. Vocals are intimate, sweet and forward (but not right in your face) and that always reminds me how the vocals sound on the best Mullard tubes. Bass is deep and well controlled and the accuracy feels very similar to the high end German ECC88s (Siemens, Telefunken.) To see how these sound differently from their German counterparts, please feel free to take at a look a wonderful pair of 1961s Siemens 6DJ8s weve recently sold here: https://www.ebay.com/itm/266281650331 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: 13,000/13,000 Tube 2: 13,000/13,000 100% perfect match! 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. Appearance & cosmetic condition We treasure this pair for its near pristine cosmetic condition - nearly 100% of the paint is well preserved. The identical date code of Heerlen factory etched on glass is also perfectly visible on both tubes: delta 3D3 (delta = Heerlen, Holland, 3 = 1963, D = April, 3 = the 3st week of the month.) 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 International by default. Its the least expensive option (even cheaper than eBay International Shipping for most countries/regions in the world) but it 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. Its DISHONEST to declare purchased items value less than the sale price on a US customs form. Its DISHONEST to declare a merchandise item as a gift on a US customs form. Soundlumia does not encourage or participate in such dishonest acts. Please do not send such request to us in the messages. WE will NOT respond to these messages and we will report repeat attempts to eBay. Buyers who cancel the order (or threaten to cancel) after purchase because we dont agree to change the declared value will be reported to eBay IMMEDIATELY and an abusive buyer case will be opened IMMEDIATELY. 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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