The JJ ECC83-S tube has several improvements in its construction from the old ECC83 version.
From our review of this tube: "This tube sports a different plate design than found in most 12AX7's. When you look at them you can't help but think that they must be rugged and good for the musician on the road. The compact plate structure does nothing to dampen their sound or dynamic response. I find them to be well balanced. While not as harmonically rich as others I tested, they do provide high gain without the usual noise and microphonic problems you would expect. This is great sound for your dollar. If you're using a combo amp and find the Philips a little rich sounding, the JJ ECC83 / 12AX7 may be your solution."
Excellent tube for some applications
Kind of bright side but harmonycally rich.
Many thanks Jon , awesome service
By Yngve 66 from Kristiansund, Norway.
Opera Consonance cyber 100 15years aniversary
This tube came with the amplifier, from the fabric.
It is a good sounding HiFi tube. A little laid back,
in the highs, but still liquid and clear. Midd, and low end, is accurate and nice sounding.
It can not compete with my NOS tubes, but having
this low price, it is a good buy.
By chris from California
Good saturation, but noisy.
They add more saturation to my Plexi clone,which I like, but they are noisy when the Master is turned up.
By Wild Bill from Fort Walton Beach, FL
Don't let the low price fool ya
This is the pre-amp tube that came with a '58 Champ kit that I built and I figured it was included with the kit because it is economical. I was so very wrong. After testing a myriad of tube combinations I have found that for that amp, this little inexpensive pre-amp is head and shoulders over anything else. Different brand tubes sound different in different amps. JJ long plate gold pin sucks in this amp but is tops for V1 in a much modded BJIII I have. Genalex Gold Lion golds are great phase inverter tubes but suck in the Champ. After one spends a small fortune on tubes they learn the secret to the magic mojo for each different amp. Electronically speaking, capacitance in the filter stage have a huge effect on the performance, tone, etc. of pre-amp tubes and coupling caps effect the output tubes. Tubes are just one part of the recipe.
By Paddy Mac from Oshawa Canada
Worth Having in your Collection
These are a good experimental tube. You won't know if you like them until you try them. Generally they are nice in the V1 position, but too fizzy in second and third gain stages. I also prefer a more expensive 3D sounding tube in the Phase inverter position than these. I put these in all positions in my 20 watt Krank Rev Jr., and smiled. That's the sound the amp was designed for. Kind of a dark scooped mids heavy metal over the top thing. You will need to trim off a bit of high end for recording to shape off the fizz, but great for chugging with heavy metal humbuckers and compression pedal. They didn't seem any more noisy than a 12AX7-A, but they have they're own character. To sum up, these are not a generic tone.
By KenA from Brazil
Use it properly
This extra short plate 12AX7 works better if you use it in the V1 ... My Friedman PT-20 came with this one in V1 and normal short plates in V2 and V3 ... I replaced the ones in V1 and V2 with 2 EH and kept this extra short JJ in V1 ... now I'm wondering if other manufacturers make similar extra short 12AX7s?
By Strat Dude from Virginia
Depends on what you're looking for....
I put a pair of these into my Vox AC4C1-12 and noticed right away that I lost about 30 percent of my preamp overdrive gain and some of the detail in the upper frequencies. They did not sound bad, but they altered the character of my amp in a way that I did not find useful. Nevertheless, I will give them a decent rating because they did in fact sound pretty good, just not the sound I was looking for.
By a seething spelunker from the grotto
I understand why JJs are so commonly used.
I really like these. They are pretty balanced and they reek of gain. There is so much fuzz that hair is coming out of my amps - love it. Also, they are cheap as dirt. I have a problem understanding negative reviews, as you have to mix and match to get what you want. You cant just buy 3, say, JJ ECC83-S and expect to get the tone you are after. You have to know what you want, and it helps to research and ask around. And you will most likely end up experimenting with different tubes. Just don't complain about not getting what you want by just buying 3 preamp tubes of the same kind. That sound you are getting with 3 of these will certainly produce the sound someone wants. It is your job to find out if you want that sound; not the tubes magically adapting to your wishes.
By Neil from Denver, CO
Nothing like a 5751
Wow, I have a Behringer Tube Monster pedal- and it came with one of these ECC 83-S tubes- it had very low output, and was fizzy sounding. I replaced with a NOS GE 5751 black triple mica, and that made an immense improvement. I got more volume, yet less fizzy overdrive. (I have 5751's in nearly every tube application I have to great success). I don't know about other applications, but for me, this is just a cheap, low output pedal with not such great tone. -NS, 40 years experience
By Kevin from Austria
I never wanted to buy JJ tubes but I gave them a try. Wanted to replace some Tung-Sols in my Powerball II. I don't like them at all, maybe they suit another amp better.
By Patrick Ryan from Kerry Ireland
For Hi Fi
Excellent replacement for high end audio preamp. Replaced Electro Harmonix with them. Much better clarity and brilliance.
By Lonnie from Virginia
Replaced the Sovtek preamp tubes in my Peavey Classic 30 with JJ ECC83S tubes. Harmonics are gone and sounds like I put a blanket over the amp. Ended up with Electro Harmonix tubes and they brought the amp to life.
By Duane from Ontario
Great tube stock in classic 30 ii
Bought my peavey classic 30 ii new in 2014 and it came stock with jj's. Very warm sounding and gives a classic rock amp a great metal sound. The clean channel is very thick, full, bassy bottom end as with the gain channel. Great tube and I recommend it to any amp owner. My classic 30 will always have jj's in it.
By shep from virginia
agree with the less harmonic content
Just got some JJ tubes today. Used them in all three preamp stages in my jca2212c amp. They lost all harmonic content compared to the stock 12ax7-b that are in the amp. The upside is all harshness in the highs and lows was gone. Maybe not the greatest tube for modern high gain. I could see it having some good uses.
By Pat from Canada
I replaced my original 12ax7 of my Peavey Ultra Plus 112 60W with these JJ ECC83-S tubes. Very happy with the result, for sure my old tubes was end of life, but this jj reborn my amp. A lot of good cleans and amazing gain. Blues to metal, anything you need.
By Omar Sostre from Puerto Rico
King of Gain 80's Metal Tube
Tons of Gain Very thick mids and tight bass response. With all the gain available you will loose some note articulation and definition. Great for 80's Metal and distortion.
By M'Ike from NW USA
Great Tube in Phase Inverter socket
I've used the Tesla - now JJ ECC83S - in my Peavey Classic 30 V3 socket going on 15 years now. After buying a VHT Special 6 Ultra, I put this tube in right before the power tube and it sounds wonderful. For my personal taste, I love this tube. Focused, even and durable. If they keep making it like this I'll keep buying it and putting it right before the output section. (I tried it in the input sections (V1) and found it kinda flat and grainy to my ears.) Incidentally, I've bought all my JJs through thetubestore, happy with the service and quality. Thanks!
By Gator from Ft.Worth Texas
Bassman RI Ltd
I put these in v1 and v3 of my IR Bassman Ltd and it made a very nice difference. Much warmer sound and made humbuckers so much better. Added complexity when coupled with the JJ 6L6GC tubes in the power amp section.
By M-it East Bay Musician from San Leandro Ca
I put this tube in several places in my 50 watt Peavey Valve King with tung-sol's and found it to be best in the phase inverter. Tight bottom, strong mids, smoothed out top, low noise, is a great combo for that last step in the preamp section.
By flyswatter from Montreal
Good all-around tube
I used the JJ 12AX7 tubes along with JJ 6L6GC power tubes to retube my old SF Super Reverb in place of the mis-match of cranky old tubes that have been in it since I bought it. The JJs added cleanliness and reduced the noise floor of the amp to almost zero -- impressive for a 34 year old amp. I lost nothing in the way of tone by going with JJs. The fact that they are inexpensive and easy to find / replace are pluses. If you're no longer able to keep old / NOS tubes running in your old Silverface, the JJ's are in my opinion a more than adequate new production replacement.
By Mr Z from London England
warm yet subtle :)
I resently got hold of a Presonus Tube Pre v2, removed the stock Chinese tube and haven't looked back! My bass guitar sounds much fuller without to much saturation. The colouration seems subtle in some respects yet still strong and distinct! Defintly worth a punt!
By John from Texas
Great warm vintage blues tone!
I completely retubed a Peavey Classic 50 2x12" with JJs from The Tube Store.First, I did the pre-amp tubes, and WOW!, what a noticeable difference and tone improvement the JJs are from the factory Sovteks. The JJs tamed the Lead channel's harsh and brittle sound, The Lead channel before was so harsh that I considered it unusable. (FYI, V2 is the Lead channel gain stage tube in Peavey Classic Series amps.)The Normal channel now sounds like a blues tube amp. The difference is remarkable from Sovteks to JJs. Along the way I also tried Electro-Harmonix 12AX7s (harsh, like the Sovteks), Groove Tubes (better, but not as good as JJs).I then replaced the Sovtek EL-84 power tubes with JJ EL-84s and the tone transformation was complete.BOTTOM LINE: I'm very happy with the JJs and the service I got from The Tube Store. Thanks for the fantastic tone!!
By Matt from Minnesota
Bought JJ ECC-83S to replace stock Chinese tubes in my ART TubeOpto 8. Sound is cleaner and more detailed. Very happy with my purchase and the speed of shipping. Thanks guys!
By Bill from Ohio
Nice General Replacement.
I find that this JJ tube has good sound, but lower gain than other 12AX7's. Its gain is more like a 5751. In a Guyatone Tube Echo pedal, it provided too little gain. If you have an amp that is "too hot" these sound nice, and will calm down amps shipped with hot preamp tubes.