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From our review of this 12AX7 tube: "This is an entirely new 12AX7 design from Sovtek and a great step up in sound quality. They have very large ribbed plates and great sound reproduction. I found them very smooth and well balanced in terms of bass, mids and treble response. The large plates make them more prone to microphonics and in combo amps, so they can be a problem if you like to run things wide open. It is still the best thing Sovtek has produced in a 12AX7, with very good gain and low noise.
I would advise against using them in compact high-powered combo amps where they will be subjected to lots of vibration. 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 a problem, it's normal for the LPS."
Other Sovtek tubes        12AX7 Types
Additional Information and Downloads
12AX7 Tube Review
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Sovtek 12AX7-LPS Datasheet (PDF)
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Warranty Information and Return Policy Warranty 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.
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from Burlington, on
great choice for phase inverter position
from St. Louis, USA
Good tube but watch where you put it
from Tamborine Mountain Queensland Australia
Best 12AX7 I've tried - love it.
By Steven Eddy
from - Texas
Best of the Russian 12AX7