The Preferred Series 7025 is a high quality 12AX7 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 12AX7. 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.
It definitely has its uses in all positions. I've used it mostly in V3.
By Marielle from Paris, France
I wanted my Engl Screamer 50 combo to sound a lot more warm and suited for blues. I first put four of these Preferred Series 7025 in replacement of the three 12AX7 Sovtek and one 12AX7 China Groove Tube that were in. Swapping the tubes made a world of difference. It went from dull and cold as hell to sunny and warm paradise.
Then I changed the two Sovtek 5881WXT for two paired SED 6L6GC and after biasing it now sounds like the amp I always wanted for bluesy and crunchy sounds. I highly recommend!
By Mike from Windsor Ont
Replace 4 really old 7025 out of my 70's Traynor YGM3. Brighter and really great gain. Amp is killer with these little tone monsters. Nice clarity through the whole range. Highly recommend.
By Aaron from Gainesville Florida
Night and Day
Got this tube awhile back and been swapping around with a few different ones to find the tone I like. I run a Tung-Sol 12AX7 in v1, the Preferred Series in v2, and Sovtek 12AX7LPS in v3 in a Peavey Valveking 212. Man with my active emgs the clear resonance and sustain are amazing. I had a JJ ECC83S in v2 and was muddy and very harsh sounding. The difference was night and day. The Preferred series is bright, natural, and clear as a bell. Buy this tube... love this tube.
By Morgan from NV USA
5 Star in a Vox AC30
You can drive yourself crazy (and spend a lot of $) tone chasing. Fun, but sometimes not worth it. Trying out these Preferred Series 7025s was worth it. I run single coil pickups into a medium distorted Vox and these tubes compress nicely and give me punch and clarity without harshness. They have less gain than JJs or Sovteks or Tung-Sols but the AC30 runs hot and bright so a little less is good. Probably not so good for humbuckers or active pickups into high gain amps.
By Jon-George from Ancaster
I've a Sansui AU-111 audio amp, a real legend. I was looking for some new tubes to waken the front end up a bit - current selection was a mix-match of brands. I decided to give these a whirl.Its been one day and I'd like to say well done. At this point, resolution and detail improved. Things settled in - in terms of a better soundstage. All and all, the amp sounds right. If the reliability is up there, I am a fan! I've also bought the 6L6's...have not installed them yet, looking forward to it!
By Ken from London, Canada
This quad got noisy
I purchased a matched quad of these preferred 12ax7 for the phono stage in my Copland preamp in Dec 2014. While they weren't the quietest tubes, I liked the tone and so there they have stayed for the past 10 months. In recent weeks I have noticed the my phono input has gotten noisy. Unlistenably noisy. I'll be trying something else this time around. I think they should be good for more than a few hundred hours.
By Ken Harris from Rustburg VA.
Great service and feedback from thetubestore. I found an original SWR Silverado 212 bass amp. After cleaning the scratchy pots I wanted a new tube just for preventive maintenance. I immediately noticed a drop in gain/volume compared to the stock tube. It was however very clean and quiet. The sound a little heavy in the mid range. I have used it at some very loud concert venues with great success. Loads of punch and clarity.
By dang from nj
first off: thetubestore.com customer service is OUTSTANDING! they are reliable, and highly ethical in their transactions. I had mixed experiences with The Preferred Series 7025 tubes. One was bad immediately; one went microphonic after very light duty usage. Jon sent me 2 replacements. So far, one sounds quite good, the other sounds even better: fuller, sweeter, nice balance of bright sparkle and sweet lows. I'd give the best tube a 5 star rating; because of inconsistent tubes, I rated them 3 1/2 stars overall. Modern tubes can be inconsistent. that seems to be the current situation. In any case, I will buy from thetubestore.com for future purchases again. Integrity counts.
By Andy from Australia
Not good for high gain guitar :S
The tube looks to be a fairly long plate and has nowhere near the gain of JJ's Engl, Sovtek. Overall a warm, soft tone.I do like high Gain Rock/metal but also look for warm chimey liquid cleans and nice low gain breakup / crunch, but it didn't do any of this for me in my gear.Engl E530 - V2 ( gain channel position ) - Gain dropped off, Sounded flat, blanket over the amp. JJ's stock 12AX7 killed it here.Engl E530 - V1 - Clean channel - flat, un-involving. Dirty Channel - Mehh smoothed of the frizzy top end with the stock Engl in V2, but dropped the gain overall and it lost some punch or power or something, Still not doing it for me.Blackstar HT Dist-X preamp pedal - Lower gain, flat, muddy. Didn't bother trying in my Blackstar HT-5.
By Chad Lewis from South Carolina
Let me start by saying that the Tube Store customer service is hands down, the best. I received two Preferred Series tubes. One went bad, but they gave me no hassle at all about replacing it. Now, my review on the one that is currently in V1 of my Pro Jr. I do not find the tube harsh at all. I find it to be very balanced in tone. I had a chance to crank the amp last night at church. After hearing my tone, it is now replacing my Marshall DSL that i have been using with Mullard preamp tubes. The Preferred Series 7025 tube was made for crunchy goodness!!!
By Seth from Arizona & Colorado.
TST must be screening these, somewhat.
I get less scritchy scratchy noises, less hum, less microphonic noise, and less mechanical noise with these. Are they as good as the old ECG STR 7025s, ...NO. I rarely see NOS STR 7025s anymore, so these are a nice option to have. Comparing against an EI may not be such a great thing. EIs could be very inconsistent. Some were fabulous, and others horribly noisy. Telefunken did a much better job with quality control, before sending their tooling to Yugoslavia's EI factory. Needless to say, "I do miss EI very much". For the price, an occasional bad valve from them was acceptable. Seeing the war in the Balkans was hard for me. Seeing the home of the Sarajevo 1984 Winter Olympics under siege was sad indeed. I have a decent stash of EIs, along with RCA, GE, Philips Sylvania, and other low noise 7025s for 1st & 2nd gain stage uses. I was never a big fan of Telefunkens for guitar, bass, or kbd amps. For hi fi, they are great! These Preferred series valves allow me to hang onto my NOS valves for truly "special" occasions. Thanks TST! Hey, let's face it, with only 3 companies making valves now, just how competitive do you really think they will be for quality? Uhhh, yeah. Not very. One maker has visions of being the ONLY remaining maker of audio valves. God help us! Keep up the good fight TST!
By Geoff from Australia
Ordered these tubes for my 73 Fender Vibrosonic along with some T.A.D. 6L6 GC and I couldn't be happier. I've had this amp for 20 years & always sourced NOS RCA tubes untill now. Given the NOS RCA sound 10/10 This combination of 7025/TAD 6L6 is easily 9/10 for a fraction of the price. As I ordered a bunch of 7025's I tried them out in my Evh 5150iii 50 watt with TAD 6L6gc with great results, creamy overdrive & big cleans. (These EVH iii amps give great Fender clean tones for a good price.) My work horse a Egnater Tour Master 4100 took on a hole new life of its own & my former work horse a Marshall DSL 100 (1999) Model has never sounded this good.Well worth the price!
By Charles Smith from Boston MA
Preferred Series 7025, my go-to 12AX7
The Preferred Series 7025 have become my go-no new production, high quality 12AX7. I start by putting two in V2 and V3 in a '68 Marshall JMP50 and I loved the tone. Then I dropped two in a Fender Blues Deluxe (also V2 and V3), and again, I loved the result. But the most dramatic change came when I re-tubed a friend's Fender Super 60; its preamp tubes were pre-historic! I dropped in two PS7025 in V1 and V2, and the amp was absolutely transformed. It was hard to believe a "red knob" Fender could sound so good. Now, I keep a private stock of PS7025's for whenever I need a high-quality, high-performance preamp tube.
By CDinMB from Melbourne Beach, FL
I bought this as part of my new Tweed Deluxe build. I bought and tried combinations of 12AY7, 5751s and 12AX7s, new and NOS. I compared to 1950s NOS GE, 1970s Ei, and I found this tube in V2 to be bright, harsh and not musical. It may be fine in a newer build like my Mesa and I may try it there and create another review. But for a tweed vintage sound, I would recommend looking at a NOS tube, not this one.
By Cemhan Baykal from Istanbul, TURKEY
I ordered this tube depending on the reviews and the description stated here, on this page. Moerover, my purpose was to change my home amp, Orange Micro terror head's stock JJ-ECC83s tubes as I was not happy with the microphonics at high gain. Moreover, I also added the matched triodes option when I was ordering as my amp has the phase inverter circuit on itself. I chose the Preferred Series 7025 to give it a try to see if it would solve all of my problems. Yes, it did! It really solved all my microphonics and hiss problems even in higher gain levels. I don't notice a great differential with the gain rates but the musical details definitely got much more clear.Just like any tube amp, it's better to wait it get warmer, like 30 minutes, in order to have a definitive idea...If you are a kind of player who often uses compression with OD or distortion together to get a smooth and sustaining tone, this one will probably be the best option.For Orange Micro Terror , I'd read that any tube replacement would be useful. This one did that too...The only down side would be for players who really demand the typical hums of the tube amps. This tube is way too clear or let's call it "transparent". This is an advantage if you have and actively use a long, analog FX setup between your guitar and the amp. With processor use, it may sound transparent, more than expected from a valve amp.After I ordered it, it reached me exactly on the 15th day. As I live abroad, I believe this period is pretty acceptable. The packing was superb, even better than I could do if I'd send it to myself!
By TIM M from San Diego, CA
BLUES JR AND HOT ROD DELUXE
This is the best tube I have ever heard/felt in a BJR (2012 Tweed NOS Cream Board, billm mods, Jensen C12N) and HRD (Jensen C12K). The Tube Store is providing an 'honestly' superb 12AX7 tube in all respects. I have been dealing with the wonderful folks ("Jon") at The Tube Store for a little more than 10 years when a 'pair' of Winged C's cost 60 bucks! "Preferred Series" labeling does not resemble Groove and Ruby Tubes marketing gimmicks in which cheaper tubes are simply relabeled and distributed at considerably higher costs. Perhaps we (Americans) could learn a thing or two regarding honesty from our Canadian brothers and eventually turn-around our miserable economy?
By Dude from USA
A transparent and clinical tube
From the description and reviews I was expecting more, but in V1 (usually a NOS Sovtek 12ax7WB) and V3 of a Peavey Classic 30 (usually an ARS branded Tesla/JJ) this tube lacked the character and "tubie-ness" that I like. Thinking this might be just a result in the C30, I tried it in my new VHT Special 6 Ultra, and in both its valve sockets I heard a significant loss of character. In both amps there was also a slight loss of gain. My feeling is that this tube is best for applications where the user/listener wants transparency and reliability/stability. Maybe a long burn in period will help? I will keep this PS tube to try in mic preamps, or as a backup for my amps, but for my taste - which is the addition of tube color and character - sadly I'm not enamored with this tube. It's not a bad tube, but I put the previous valves back and I'm happy again.
By Ian from Kingston
Preferred Series Tubes
Upgraded the tubes in my JoLida FX 10 with thetubestore's Preferred Series 7189/EL84 and Preferred Series 7025/12AX7 tubes. I am impressed with the improvements to the sound of the amplifier. The imaging and soundstage have improved, there is better bass response and the amp has better control of the music. These tubes are an excellent upgrade!
By Dylan from Burlington, ON
Best 12AX7 I've tried yet
Having tested these tubes in a wide range of different amps (half a dozen Marshalls, Mesa/Boogie Quad Preamp, Orange Tiny Terror, vintage and modern Traynor Amps and a Matamp Mini Rock) I can conclusively say that these tubes are my "preferred" 12AX7.Why? Let me count the ways. While they do not overemphasize any particular frequency range, there is a fullness across the entire spectrum of sound - all without sounding pushed or imposing itself on the amp's natural character. Lower frequencies seem to benefit as my favourite Telecaster will attest to. Low gain settings are present and warm. Breakup on this tube is fantastic - tremendous crunch and not a hint being harsh or grainy. This is a tube that can handle high and extreme gain settings quite nicely.By general comparison, JJ's to sound a bit thinner and "glassy". Tung Sol's have a slight grainy characteristic that "blurs" further up the frequency range as it goes. Both of these others can be used to taste, in my opinion, but overall the Preferred Series stand head and shoulders above them for just a few dollars more.For what it's worth, I have also played with the reissue Gold Lions and NOS Phillips. While I don't consider myself as familiar with these tubes, I'd still recommend the Preferred Series ahead them. While I'm thankful to live a short distance from The Tube Store, I should be clear that I have no personal or professional ties to them. With that said, they have been great to deal with and I would not hesitate to recommend doing business with them.
By Tone Savage from Seattle
I got one of these for my Fender Super Champ X2 with a matched set of Tung-Sol 6V6GT's. I got this guy cause it's like a Telefunken harmonically. After a good break in I gotta say I'm a 100% satisfied. Rich harmonics with a controlled top end, chime for days, and hifi tonal characteristics. Probably the best 12ax7 on the market for a head period.
By Troy Guinn from Damascus, Md.
This tube blew my mind
I put this tube in my new Blackstar HT-5RH, and was simply astounded. This tube replaced a Sovtek 12AX7WA, and by comparison, there is no comparison. The clean channel was more articulate, the reverb seemed more lush, the overdrive channel crushed even harder, and even the MP3 input seemed to sound clearer. These are the only preamp tubes I'll buy from now on.
By Tom from Riverside, CA USA
GREAT Preamp Tubes!
I put a matched set of 6 of these in my Custom Audio Amplifiers OD 100 SE + (Suhr Made). This is a boutique 100 Watt Hi Gain head. The stock tubes sounded good but these tubes make this amp sounds BALLZ OUT AMAZING. Great overdrive and hi gain tones. Very even and non-harsh distortion sounds across the spectrum. Cleans are very nice and warm too. These tubes are a bit pricey but definitely worth every penny.
By Gabriel from QC, Canada
Wow, big upgrade from the JJ's
I received the Preferred Series 7025 this morning for my Mesa Boogie Mark V. Thanks! Wow, big upgrade from the JJ's. I really love these tubes!
By KEVYN from Henderson, NV
I am a home studio owner that have nice vintech mic pres to audient to black lion audio, but i didn't own a tube mic pre. I looked for a long time and found the art mpa pro 2 tube mic pre, it is amazing what you can get out of this pre for its price range but one thing you realize very quickly is that the tube in it is not up to par. So i put new mullurd tubes in it the sound improved drastically but what I noticed was the dynamic range gave out very quickly there was a certain distortion not in a good way that happened when you got to the end of its range. So I called the people at thetubestore.com and spoke with someone and they said to try the Preferred Series 7025. Well let me tell you these tubes took that mic pre to a whole other level, the dynamic range is unbelievable,the high end is silk smooth the midrange has clarity and the low end on the bass is tight and strong. This is so far my tube of choice thank you so much for great service and great recommendations!!!
By KEVYN from Henderson, NV
I am a home studio owner that has nice Vintech mic pres to Audient to Black Lion Audio, but I didn't own a tube mic pre. I looked for a long time and found the ART MPA Pro 2 tube mic pre, it is amazing what you can get out of this pre for its price range. But one thing you realize very quickly is that the tube in it is not up to par. So I put new Mullard tubes in it and the sound improved drastically but what I noticed was the dynamic range gave out very quickly. There was a certain distortion (not in a good way) that happened when you got to the end of its range. So I called the people at thetubestore and spoke with someone. They said to try the PS-7025. Well let me tell you these tubes took that mic pre to a whole other level. The dynamic range is unbelievable, the high end is silk smooth, the midrange has clarity, and the low end on the bass is tight and strong. This is so far my tube of choice. Thank you so much for great service and great recommendations!!!
By Anderson Johnson from Atlantic City / Galloway NJ
The 7025 Preferred Series
I have been buying tubes from the Tube Store for a bunch of years. Great service and everything but I change my tubes once a year as I begin a new recording / playing cycle and most of the time I just buy the cheapest tubes they got. I didn't think it made that much of a difference. So since I had a little extra cash this month I went a head and bought these Preferred Series 7025 tubes for my 1977 50 watt Marshall JMP MKII. Wow! I decided to see if it was worth the money so I recorded a pass with the old tubes (a set of JJ ECC83S) about 1 year old along with the 1 year old Tung-Sol 6550's that are still in there and then another pass with the 7025. I was stunned to here the difference. The high end is much more crisp and defined plus the bottom is much tighter which may be due to the better defined lower mid range, but either way a much more detailed and rich tone. I hope this helps those who are like me that think it doesn't matter that much, it does for me. Thanks Tube Store!
By Perfect Vision & Sound from Avon, CT
Replacement in Ibanez TK999HT
I purchased an Ibanez TK999HT tube distortion pedal because I am into tubes. Upon opening and using the pedal it was very noisy and the distortion was harsh and not harmonic as I expected. Upon loving the “Preferred Series” in my Vintage Amps and rebuilds, I decided to try the Preferred Series in the Ibanez just to see if there was any difference. WOW to my surprise the elevated noise was gone and the distortion was smooth and very harmonic. I was and still very blown away. I do not say this lightly since most times a tube change is different and possibly just a better match for a particular amp circuit. If you have this pedal or plan on getting one get this tube!!!!!!!
By John Czapla from Richboro, PA
Great Tube in Aesthetix Audio Preamp
Rolled out the stock tubes in my Aesthetix Rhea Sig Preamp with positive results. Much better than expected. Lower noise and more transparency across all frequencies. So far, I notice most improvement in the high and bass. The highs have more air and soundstage is deeper due to the transparency gains. The lower registers simply have more clarity.. I can more clearly hear the rolling bass lines and reverb / air plus there has been some gain in dynamics and punch.
Very quiet. Highly recommended. I am going to get another set and roll out the cheap Chinese 12AX7's in my Marshall JVM 415 amp. Will let you know.
By Matt from Boston
Great in Vox
Put one of these in the pre-amp section of my Vox Tonelab SE FX processor. Sounds the nuts, best it's ever sounded. Put that in front of my Vox Tube amp and it's quite a combo. Going to replace my amp tubes soon and am considering these for the pre-amp/Phase inverter section 12ax7 and the JJ EL84 Teslas for the Power Amp section.
By Daniel from Southern California
Popped this into the phase inverter of my Egnater Tweaker 15. I used to leave my bright switch on, but now it's too bright with it on. Which is nice because I really have more frequency to work with. Clear and open. Really made a huge difference. There is no hype here, it's the real deal. No regrets.
By Justin from Iowa
I have a Blackstar HT-60 Stage and one of the preamp tubes went BADLY microphonic so I needed a replacement! I'm really glad I didn't buy the normal Chinese garbage that comes with the amp and I decided to spend the little extra cash! Like others said it REALLY tightens up the sound and gives is an almost "brighter" sound.. but honestly i think that's most likely because it tightened up the sound so much it seems cleaner! Not much i can say against them installed simple enough and sound great!
By Daniel from Laredo, tx
Warmer, brighter... stronger
Excellent tube. I changed my Jan-GE tube for this one on a Mic Preamp, the result....Incredible, the vocals sounded bigger, warmer with a lot more definition and clarity. Every little sound was captured by my mic when this baby starts to work... My experience - it became a total different preamp sound for the better of course...
By James from Charleston, SC
Happy in a Supro T Bolt
I put the Preferred Series 7025 / 12AX7 in an old Supro T bolt. The only preamp tube that has sounded good previously is the old RCA 12AX7. The PS-7025 was a relief. They have good power, good harmonics, tone and sound very close to the original. They also add a little punch w/o tone loss. I very was happy with them.ThxJames
By Kirk from Lombard IL
I received the order on time and have to say that your Preferred Series tubes are great! I bought an Egnater Tweaker 15w half stack that sounded good right out of the box and retubed it just so the amp would reach its full potential. I am especially pleased with the low noise level. Worth every penny.
By Jdub from Kingston
Marshall Haze Premium Pkg
I recently did a tube overhaul on my Marshall Haze 40 combo. What a difference these tubes make!! This amp has always been to muddy for my liking, with the stock Marshall tubes and JJ's. Now, the amp is much more alive -- tight bottom, Marshall growl, and clean, crisp highs. I changed both the pre-amp and power tubes with the Premium Pkg of SED Winged C EL34 and Preferred Series 7025... definitely worth every penny!! Thanks!
By Mark F from Omaha, Nebraska
Thoughts on the Preferred Series 7025
Wanted to let you know my thoughts after comparing the stock preamp tubes in my Peavey Rock Master (unlabeled) with the Preferred Series 7025's I recently bought from you. I switched back & forth several times, using the same amp & guitar settings, listening carefully for differences. I mainly used the clean channel turned up to where it distorted, and alternated between the guitar's volume knob being maxed, then backed off until it cleaned up. I used mostly open chords and slow, simple solo lines.
Although the tubes that were in there don't suck, I do like the new ones better. My initial reaction was that they're brighter, but it's not quite that simple. With the neck pickup selected, when strumming an open E chord, the old tubes actually have a more boomy sound, with the low E and A strings dominating the sound, covering up the high B and E strings a bit. When alternating between the low E, A & D strings, it sounded a little fuzzy & undefined, with a bit of a "grind" (this is on the clean channel, keep in mind). The new tubes allow the higher notes to really ring out on the open chords, but the low notes are still full sounding. The lows don't quite drone as much (which some may want), but they sound a bit tighter---more controlled, and without the grind. These tubes overdrive just as soon, but they do it more "gracefully".
With individual notes picked, especially higher notes, this is where it's somewhat surprising. Although open chords sound brighter, solo lines sound warmer. With the old tubes, notes on the higher strings sound more brittle and tinny---especially on the G & B strings. There's a harshness that's hard to describe. With the new tubes, they sound bright but smooth---cleaner & "quieter", if you will. It's kind of a paradox that they they're both brighter and less brittle & harsh at the same time. The differences translate into the high gain channels, but I wanted to use the clean channel as a starting point, since it's less likely to cover things up.
Together with the TAD 6L6WGC-STR's, it has made a difference for the better. ALSO, the mod that Jerry Pinnelli at FJA Mods did on my preamp is PHENOMENAL sounding---more along the lines of a modded Marshall JCM800 now. The new tubes really go well with the mod, and give me the sound I was looking for.