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Your cart is empty.The Electro Harmonix 12AU7 is a premium quality low gain preamp tube that is great for low noise applications. This tube is great for the driver position in amplifiers and provides an excellent and detailed soundstage that is impressive.
Shemm
Reviewed in the United States on August 1, 2024
Rectifier tube for my tube amp. Works well.
garb
Reviewed in the United States on November 17, 2024
I bought this as a replacement tube for a Warm Audio Pre-amplifier for the future when needed.Price was very fair, and the delivery time was quick.Highly recommend supporting this small business that serves its customers well.
GE Wilson
Reviewed in the United States on November 11, 2022
Organic sounding, clear sound stage, without coloration
Rudy Perea Jr.
Reviewed in the United States on October 10, 2020
This has tight base with expressive warm tone. The tube doesn't seem to run hot, is balanced and I will have to see how long it lasts.
AG
Reviewed in the United States on October 14, 2019
Using with Bravo Audio v2, nice warm tube sound, recommended
Keith
Reviewed in the United States on December 5, 2018
I purchased this tube for a Little Bear P10 headphone amplifier, to see how much a different tube would effect the sound of the amp.Compared to the Shuguang 12AU7 it replaced, here are the tonal differences I'm hearing with Beyerdynamic DT-990 Pro's.-Better instrument separation in the soundstage. More spatial sounding.-Vocals sound more intimate, and generally warmer in the 800-1000hz range.-Upper mids are brighter and more aggressive, where the Shuguang was more neutral and accurate, but boring.-Highs are much more crisp and less artificial and "tinny" sounding. The Shuguang had quite a bit of "fizz" in the highs, whereas the EH is slightly grainier, more emphasized, and more detailed as a result. Again, it's more fun, but also slightly more fatiguing.-Not much difference in the bass. Both tubes have BIG, clean, deep, powerful bass through this amp. I was worried I'd lose some of the great bass with this tube versus the Shuguang, but nope, it's all there, and still equally excellent.I can't comment on whether or not the fact this is a balanced tube has any effect on the sound, all I know is I do really like the way this tube sounds in my amp!
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