Electro-Harmonix 12AX7-EH Gold
From our review of this tube: "The 12AX7-EH tube has a nice balanced sound, a very low noise floor and excellent performance in terms of microphonics. The lack of microphonics may be due in part to the return of a shorter plate structure or better materials. I've had some samples that were tried in various amp stages. Pre-amps, tone stacks and phase inverters, a winner in every location...I have used the EH to successfully tame amps that defied all other attempts to kill microphonics and unwanted feedback. This tube is a winner, buy 'em and try 'em, they may be just the piece you've been looking for."
One other note about the construction of these tubes is they have filaments that are almost completely encased in the plate structure. They often don't "light up" when working properly. This is not aproblem, it's normal for the gold pin 12AX7-EH.
Other Electro-Harmonix tubes12AX7 Types
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Warranty Information and Return PolicyWarranty Period: 3 months
All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)
If you receive a tube that does not perform to the manufacturer's specifications, please do the following:
- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.
Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.
We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.
These guidelines may be updated without notice.
Ratings & Reviews
Rogue Atlas Magnum
My system is audio one with a Simaudio P5 LE pre and a Rogue Atlas magnum power amp. I am running KT-120 power tubes. My speakers are Harbeth P3ESR. I am now tube rolling the 12AX7 and 12AU7 driver tubes to put some zing in my system which has become a bit to blah lately. I have tried this EH gold. It is a good tube. Very musical and in that sense, better than the mullard and JJ tubes I tried. The only area I can criticize this tube in my system is that it is a bit sibilant at times, and this may be system specific of course. Very clear and musical is the bottom line.
Vox ac-4 tv
I tried this Electro Harmonix 12AX7 Gold in my AC4-TV .Now the amp sounds much bigger and darker. Great tone. But the amp is a little more noisy (hiss and hum). 5 stars for tone, deduct 1 star for noise = 4 stars.