Perfectly balanced vintage Mullard 12AU7/ECC82 audio tube w/ Goal Post Square Getter - Made in Blackburn, Gt. Britain - 1957 - NOS - Original Packaging - Ultra Rare
Tube Summary
No other tubes can deliver vocals like the Blackburn Mullard's, and that's a fact. These special ECC82 tubes, with the rare goal post square getter, 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 Tube Testing
The tube tested NOS (100%+ nominal mutual conductance) and 100% matched on a reliable recently calibrated Mercury 2000 tube tester with the following results (mutual conductance both in uMhos and in percentage of nominal):
Tube 1: 3,200/3,380(107%/113%)
Good tubes start at 2000 and new tubes (incl. NOS/NIB) 3,000 - 3,100, and the Mercury 2000's rated mutual conductance (nominal) for new tubes is 3,000. 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 to a tube's ability to amplify sound, so the higher these numbers the stronger.
Appearance & cosmetic condition
This tube is in pristine cosmetic condition with nearly 100% of the paint and lettering well retained. The Blackburn date code etched on glass is also perfectly:
K61 B7E (K61 = ECC82 production #1, B = Blackburn, 7 = 1957, E = May)
Packaging
This pair of tubes will be packaged in the original Mullard 12AU7/ECC82 tube box.
