This Boldwin tubes were produced by Sylvania in 1960s.
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One thought on “Sylvania 12au7 Gray Plates”
Another gray plate 12au7 and another disaster, and while they might have worked well in organs, they definitely don’t work well in high-end amplifiers. I tried the Sylvania 12AU7 Gray Plates (Baldwin) in both my McIntosh 275 and 300B SET amp with the same results, finding the sound quite sharp and unpleasant. Even though these were used tubes and well burned in, that sharpness remained persistent. I really wanted to give these tubes another try since they come from the same lineage as the Sylvania Gold Brand, but upon second testing, they still only sounded okay. While they might work well in an old-fashioned receiver with vintage speakers, if you are buying modern tube gear, you want the best of the best, and there is really no point in wasting your life on mediocrity like this.
* Compatibility: Poor performance in high-end gear like McIntosh 275 or 300B SET amplifiers. * Tonality: Unpleasant sharpness that persists even after the tubes are well burned in. * Lineage: Shares history with Sylvania Gold Brand but fails to live up to that premium standard. * Ideal Use: Potentially suited for vintage receivers or organs rather than modern hi-fi systems.
Final Verdict: The Sylvania 12AU7 Gray Plates (Baldwin) is a disappointing performer that lacks the refinement necessary for high-end audio, making it a tube to avoid in favor of more musical alternatives.
Another gray plate 12au7 and another disaster, and while they might have worked well in organs, they definitely don’t work well in high-end amplifiers. I tried the Sylvania 12AU7 Gray Plates (Baldwin) in both my McIntosh 275 and 300B SET amp with the same results, finding the sound quite sharp and unpleasant. Even though these were used tubes and well burned in, that sharpness remained persistent. I really wanted to give these tubes another try since they come from the same lineage as the Sylvania Gold Brand, but upon second testing, they still only sounded okay. While they might work well in an old-fashioned receiver with vintage speakers, if you are buying modern tube gear, you want the best of the best, and there is really no point in wasting your life on mediocrity like this.
* Compatibility: Poor performance in high-end gear like McIntosh 275 or 300B SET amplifiers.
* Tonality: Unpleasant sharpness that persists even after the tubes are well burned in.
* Lineage: Shares history with Sylvania Gold Brand but fails to live up to that premium standard.
* Ideal Use: Potentially suited for vintage receivers or organs rather than modern hi-fi systems.
Final Verdict: The Sylvania 12AU7 Gray Plates (Baldwin) is a disappointing performer that lacks the refinement necessary for high-end audio, making it a tube to avoid in favor of more musical alternatives.