(11 votes, average: 3.27 out of 5)
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“This is a nice heavy metal tube…” Read

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(26 votes, average: 3.81 out of 5)

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“The most liquid of all the tubes, It lets the highs just roll off.” Read

“This has to be the most detailed sound I’ve ever gotten out of the ‘head.” Read

(13 votes, average: 3.38 out of 5)
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“…replaced the Tellies with the 5751’s and the screen was removed, I was able to stick my head out of the window and clearly see to the left and right. ” Read

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For those familiar with high-fidelity vacuum tubes, the Sylvania 5751 JHS and Gold Brand (GB) triple-mica variants are often regarded as the industry standard for audio performance. While collectors frequently prioritize the JHS black-plate or GB gray-plate versions for their aesthetic appeal—notably the gold pins and lettering—audiophiles seeking superior sound quality can achieve the same results at a significantly lower price point. By looking beyond the premium branding, it is possible to acquire these tubes for approximately $20 to $25, compared to the $100 market rate for “Gold” labeled versions.

(8 votes, average: 4.38 out of 5)
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“The strength of this tube is its overall balance. Its got the 5751 sense of focus in spades, is clean, open and evenhanded in frequency response if just a little sweet on top.” Read

“Very sweet, warm vocals. Very open soundstage. With classical, you really feel the vibration of the violin strings. It is very warm and very nice. It really gives a distance sensation.” Read

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(13 votes, average: 4.38 out of 5)
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“i think the vintage G.E. 5751 have the best sound from those 5..warm sound clear mid ranges.” Read

“… on that configuration the GE 5751 3 mica black plates just has no equal.” Read

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(9 votes, average: 3.67 out of 5)

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GE purchased Ken-Rad (Kentucky Radio Corporation) in 1945, although tubes under Ken-Rad brand have been produced until 1951, so a lot of references are for GE not Ken-Rad

” The GE Black plate 12AX7 (and 5751) have an enchanting and beautiful sound. Articulation is excellent, though not as detailed as the TungSol. Sound stage is expansive and inclusive.” Read

(14 votes, average: 3.93 out of 5)
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“I do believe I’m in love. The Raytheon black plate 3 mice (1961)
is truly wonderful. I do like it better even than a GE BP 3-mica (1957).
clarity, dynamics, bass. yum.”

” Sweet and smooth Raytheon 5751 tubes with the rare four bladed windmill shape top getter. Rich and smooth tone with quiet background.” Read

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(11 votes, average: 4.36 out of 5)
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“Wow, now here is a tube I didn’t expect to be as nice as it is, especially with the gold brand to compete with. This is a great tube, very solid buy. The dynamics are great, and they reproduce the sound very accurately.” Read

“Its strength is its midrange, but it may also be its weakness. The mids here are full, lush, tangible and maybe (just maybe) a trifle overblown. Occasionally i find the lush full vocals obscure just a bit of detail and reduce transparency slightly, but the mids are so lush I could understand how you might not care.” Read

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