Preferred Series 7025 / 12AX7 Preamp Vacuum Tube
The Preferred Series 7025 preamp tube is a high quality 12AX7 vacuum tube type. This tube is a reproduction of the highly regarded and sought after Mullards from the 1960s.
This 7025 is a high quality and very rugged custom 12AX7 tube. The plates are manufactured out of a premium metal imported from Germany and supported with extra thick mica spacers to insure against microphonics. They are burned in and tested at the factory and then again on our digital high voltage equipment to make sure the tubes selected for you will provide outstanding tone and performance.
From our review: "A great sounding 12AX7 tube type that reminds me a little more of the ECC83 that Ei made in the old days. That's a pretty nice compliment. I compared this tube against an old Ei and Telefunken smooth plate and there was very little difference. Lots of gain with a rather low noise floor. No microphonics issues at all. Very good considering the large plate size. Spot welding may be better for microphonics than crimped plates. I tried it in all the standard guitar amp duties and it was fine. Fabulous in Blackface Fender amps. We tried this 7025 in a 66 Vibrolux reverb 2x10 combo and the tones were all there. Light and shimmering or really aggressive, it's all good."
Warranty: The Preferred Series 7025 tubes carry a 6 month extended warranty.
Other Preferred Series tubes
12AX7 TypesAdditional Information and Downloads
Reviews:
12AX7 Tube Review
Tube Matching Information:
Matched Sections Service
Downloads:
Preferred Series 7025 Datasheet (PDF)
Download Adobe Acrobat PDF reader
Warranty Information and Return Policy
Warranty Period: 6 monthsPreferred Series tubes have a 6 month warranty from 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 180 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 6 months, or are returned improperly.
These guidelines may be updated without notice.
Ratings & Reviews
90 reviews
Preferred Series 7025 | Fantastic HI Fi tube for Scott or any amp needing a great line level tube!!
by Steve Rowe -
First off, the tube store service is second to none. I have bought tubes from them for years. I had some 12AX7 that did not work in a Chinese CJ clone preamp and they immediately had me send them back for them to test. They tested fine but for whatever reason, those tubes just did not agree with that piece. Full refund issued no questions asked. I moved on from that piece anyway. Now to the point.
These Preferred Series 7025 tubes are the finest I have rolled into my HH Scott 299d integrated amp! I have tried many pairs for the line section. Some have been very good but always looking for the perfect fit. Took a chance on these without any nos name recognition etc.. they are absolutely fantastic!! Warm with incredible detail and low end. I am shocked and will be ordering more matched pairs to have on hand for this and my other amps that use these. Thank you!!!
Preferred Series 7025 | Highly Recommended 12AX7
by John -
Highly recommended. I put two PS-7025 into v1 and v2 of a reverb unit that sounded microphonic, and it is now quiet. I also put three into a 65' Fender Super Reverb, and the amp operates quietly, has great headroom, and great tone. I just ordered 10 more to put in other amps.
Preferred Series 7025 | Pin Weakness issue
by Byron -
May sound ok but I wont know. Beware because but the pins are very fragile and break very easily even when your gentle
Preferred Series 7025 | My no-brainer choice for over a decade.
by Jordon Brosseau -
Used these 7025 for years in my Vox AC15HW (hand-wired in the UK), which had an immediate improvement by switching to the Preferred Series from the stock JJs.
When the time came to retube my Marshall Silver Jubilee Studio (2525h), once again -- a total no-brainer. Preferred Series all the way.
Sounds just like my Marshall that I know and love... but with a bit more clarity when driven (input gain around 6-8 range w a tubescreamer slamming the front end). And somehow, it just sounds a bit more "Marshall-y"... Nice purr & growl in the mids, a bit more cut in the highs without being harsh, and the lows are thick and girthy without being boomy.
Note: I always get my preamp tubes matched so I can swap out V1 for V3 in a pinch (and it takes out the guesswork when doing a full swap) -- just throw 'em in and let it rip!
Preferred Series 7025 | A Modern 12AX7 That Lives up to It's Promise
by Bodey -
I've typically bought NOS tubes for my amps because I find they have a richer, more open sound to them. As real NOS tubes are becoming scarce and expensive, I decided to try a Preferred Series tube based on all the great reviews. I have a few NOS Mullard 12AX7s I've been saving and thought I'd compare one to this 12AX7, since it's based on that design. I have to agree 100% with a past reviewer when I say that this tube is brilliant. It sounds just as clear and rich as an original Mullard from the 60s, which really surprised me based on the price of the tube. I don't think I can justify buying a NOS 12AX7 again after hearing this tube; it's just too good. I can't recommend this tube enough based on the sound it produces, it's truly exquisite.