“The Tungsram are brighter on the high frequencies anda little coolerregarding the midrangeproducing accurate sonics without beingthe least bit sterile sounding in my applications.” Read

“Tungsram sounds much more precise, open, and clear, with more resolution top-to-bottom.” Read

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“The Siemens is energetic, precise, and dynamic, the tube I like to wake up a sleepy or softish vintage. Very quiet, with extended powerful bass.” Read

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5 Stars4 Stars3 Stars2 Stars1 Star (6 votes, average: 4.00 out of 5)

5 Stars4 Stars3 Stars2 Stars1 Star (9 votes, average: 4.22 out of 5)

5 Stars4 Stars3 Stars2 Stars1 Star (23 votes, average: 4.09 out of 5)

” great sounding sub for 12AU7, low noise, sweet sound, great bass”

“like most RCA tubes does everything well, with a good natural timbre and sense of authority through the whole range, while also open and quiet.” Read

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5 Stars4 Stars3 Stars2 Stars1 Star (9 votes, average: 3.22 out of 5)

5 Stars4 Stars3 Stars2 Stars1 Star (8 votes, average: 4.13 out of 5)

“Using this tube in the Minimax buffer slot and it adds an incredible dynamism and dimensionality to the music. ” Read

“…man are they liquid and sweet! Some of the finest I have ever heard of that family!” Read

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5 Stars4 Stars3 Stars2 Stars1 Star (10 votes, average: 3.70 out of 5)

“A very nice sounding tube. Brilliant midrange, good bass extension, and a little rolled-off on top.” Read

“…the tube wasn’t so much slowing things down as it was taking its own sweet time to show you all it had on offer.” Read

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5 Stars4 Stars3 Stars2 Stars1 Star (26 votes, average: 3.73 out of 5)

Again 🙁 no reviews found on the web. General consensus that this is one of the best 12au7/5814 tubes. See our review…