Mullard 12AU7 ECC82 Matched Pair - Philips/Adzam Labels - Blackburn 1964 Gf2 For Sale

Tube Summary
No other tubes can deliver vocals like the Blackburn Mullard\'s, and that\'s a fact. These ECC82 tubes, especially the early 1960s ones, are extremely hard to find today and are becoming every serious audiophile\'s darling.
Sound Characteristics
The overall tonality of Mullard ECC82 tubes is warm and lively with a very spacious sound stage.\"Like a warm British jacket of the finest tweed, these glorious tubes have an attractive sweet warmth in their midrange and lower regions.\" This is how the experts on audiotubes.com describe the sound signature of British-made Mullard tubes.The top end is silky and pleasant and doesn\'t get rolled off. They retain a fine sense of \"air\" at the top, and the upper midrange is smooth and liquid. These tubes reproduce the human voice, especially female voices, with haunting realism. The British made Mullard tubes are also known to have an attractive sparkle at the top with rich bass...now we know where that \"warm British jacket\" comes from!
Professional SoundEvaluation
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: Woo AudioWA7 Fireflies (3rd gen) Balanced Headphone Amplifier- 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 testing & sound evaluation
NO shorts, leakage or gas.NO noise or microphonics.
Both tubestestedNear NOS(90%+ nominal mutual conductance) and tightly matched on a reliable recently calibrated Mercury 2000 tube tester with the following results (mutual conductance both inuMhos and in percentage of nominal):
Tube 1: 2,800/3,150 (93%/105%)Tube 2: 2,800/3,080 (93%/103%)
Good tubes start at2000and new tubes (incl. NOS/NIB)3,000 - 3,100, and theMercury 2000\'s rated mutual conductance (nominal) for new tubes is3,000. 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 toatube\'s ability to amplify sound,so the higher these numbers the stronger.
Appearance & cosmetic condition
One withthe ultra rare yellow print Mullard shield logo and the otherwith the Philips Miniwatt label, both tubes are in excellent cosmetic condition. Nearly 100% of the paint and lettering are well retained. The Blackburn date codes etched on glass are also perfectly visible on both tubes:
Gf2 B4B3 (Gf2 =ECC82 production gen #2, B= Blackburn, 4 = 1964, B = February, 3 = Week 3 of production month)Gf2 B4H2 (Gf2 =ECC82 production gen #2, B= Blackburn, 4 = 1964, H = August, 2 = Week 2 of production month)
Packaging
This pair of tubes will be packaged in new white boxes.
Shipping Policy
-US Shipping:Flat-rate USPS Ground Advantage-International Shipping:(Please read carefully)USPS First Class International is used for all countries EXCEPT: Armenia, Chile, China, India, Latvia, Mauritius, Mexico, Serbia, Slovenia, Tuvalu, and Vietnam.If you prefer to use a different carrier or shipping service, please contact us first so we can establish shipping rates before you make payment.If you are a buyer in one of the excluded countries,you must contact us prior to purchase to arrange shipping.Soundlumia-sponsored 3-day guaranteed worldwide delivery program($35 flat rate for ALL destinations in the world) via DHL Express is highly recommended.
- Same day shipping: Orders placed by2:00PM US Pacific Timeon 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 orderships.
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 . 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 your mind.\"
Tube rollers abusing the return system will be reported to immediately and negative response will be left to your account - that\'s guaranteed. We have already opened several dispute cases to report abusive buyers and has always ruled in our favor. International buyers who request return or refund claiming your country\'s import duties or sales taxes/VAT/GST are too high will be reported to immediately for dishonesty and will be permanently blacklisted from purchasing from Soundlumia. We are committed to working closely with to help rid the marketplace of dishonest, unjust, unreasonable, abusive buyers that are detrimental to the vintage tubes market and the audiophile community.