Ranked by reader star ratings (3+ votes).
I did not plan on owning Siemens CCa tubes. Nobody plans on that. You buy a pair “just to see what the fuss is about,” and six months later you are explaining to someone you love why a small glass cylinder costs more than the shoes you are currently wearing.
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And here we go with Brimar again, I got lucky recently and received a lot of superb Brimar tubes. This tube is exceptionally nice, it is transparent, airy, and musical, making it well worth searching for. The biggest issue with these tubes is that there are so many fakes out there, as Brimar brand was unfortunately abused during the later days of tube manufacturing when the brand was stamped on tubes not manufactured by Brimar in the UK. I have encountered many tubes branded as Brimar that were actually made in Russia. One sure way to determine authenticity is to locate the date stamp, though that can be difficult since Brimar is one of the few European companies that did not use acid codes, meaning the stamps come off easily or could be removed by accident. To identify a genuine one, look for a tube with a distinctly flat top, as Brimar has some of the flattest tops in the industry with no creases like those found on Mullard or Amperex. Additionally, Brimar typically features either a square or round getter that is usually quite large.
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There is no mistaking the sonic signature of the Mullard E88CC/6922 Wrinkled Glass; it carries that classic Mullard house sound that is impossible to confuse with anything else. However, despite its legendary status, it isn’t necessarily a personal favorite within the 6922 family. The primary drawback is the high-frequency extension, which rolls off a bit too early for my taste, resulting in a presentation that feels overly warm and a soundstage that lacks the width found in rival tubes.
This is a very, very rare tube, appearing even less frequently than the 6922 pinched waist variety. The specific example I have dates from 1957 and features a D-getter, making it a true collector’s item. Sound-wise, it is very similar to the Amperex 6922 PW, although it is not quite as transparent, it possesses that same delicate sonic signature but with a bit more warmth, which would be a distinct advantage in certain systems. Overall, this is a great tube, the delicacy of the vocals makes it feel very special, though unfortunately, this unique quality was lost in later versions of the production.
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The Siemens E88CC Gold Pins is undeniably one of the premier 6DJ8-family tubes ever produced. It delivers a very airy presentation characterized by a vast soundstage and truly incredible vocal reproduction. The midrange is easily the strongest attribute here; vocals shine with such delicate, luscious, and grain-free textures that they become addictive. It is smooth and intensely musical, making it the “holy grail” for enthusiasts of vocal jazz.
The Amperex 6922 Pinched Waist D-getter is the undisputed best of the best in the 6DJ8 family—and easily as rare as they come. This tube is simply fantastic; it has it all. The presentation is incredibly natural and transparent, featuring a beautifully sweet top end paired with firm, controlled bass. The mid-range remains organic with just the perfect touch of vintage tube warmth.
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This is a truly fascinating find, as I could have sworn that 6DJ8 tubes with black plates simply did not exist after inspecting thousands of them over the years. This particular Sylvania 6DJ8 Black Plates was discovered in a beat-up box rescued from a garbage pile, yet the tube itself is in superb, seemingly NOS condition.
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Another impressive offering from Tesla that holds its own in a competitive field. While it may not possess the immediate “wow factor” of the E83CC, it remains one of the more musically pleasing 6DJ8 variants currently available.
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The Reflector 6N23P-EV is another standout offering from the renowned Reflector factory. While its sound signature is closely related to the famous 6N30P from the same facility, it offers its own distinct character. As a direct replacement for the 6922 and 6DJ8, this tube is an incredibly versatile option for a wide range of high-fidelity equipment.
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