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."
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.