JJ ECC83-S / 12AX7 Tube

32 Reviews

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USD $‎17.95
1 – 4USD $‎17.95
5 – 99USD $‎16.95
The JJ ECC83-S / 12AX7 tube has several improvements in its construction from the old ECC83 version.

From our review of this tube: "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..."

JJ Electronic is distinguished worldwide for manufacturing high quality audio tubes and capacitors. They have been producing vacuum tubes for over 30 years in the Slovak Republic.

Other JJ Electronics tubes      12AX7 Types

Additional Information and Downloads

12AX7 Tube Review

Tube Matching Information:
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JJ ECC83-S / 12AX7 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.

Best value


Best value, smooth response, great for high gain, very long lasting tube.

My go to preamp tube.


My go to preamp tube. Always consistent always sound great in my JMC 800 2203X. Clean or dirty always right.

Mediocre and FIZZY


Rugged and durable but mediocre sound quality. Many say they sound dark, but my experience is that they have a harsh and particularly fizzy character when driven into distortion. In a Marshall, this results in a persistent fizz on top of notes that cannot be dialed out. In a clean Fender amp, they sound ok until pushed hard, then they break up harshly with a grating "bark". I have found these characteristics remain true whether they're placed in the first stage, or the tone stage/cathode follower. Interestingly, I do really like the JJ in the PI position, better than the Sovtek LPS in fact, which seemed too aggressive in the upper midrange when used as PI.

Not for Sparkly Guitar Amps


This tube would be good in a high gain amp. Probably great in a Marshall or Orange amp where you want to tame the bass and have tight, responsive mids with not too much fizz. 3 stars because it's not a bad tube just not for sparkly clean amps.

Not my cup of tea. Tames the low-low mids and bass (tight af), has strong upper mids. Not much treble; very dark. I tried this in a Fender Blues Deluxe RI (basically a Hot Rod Deluxe on the clean channel) and it was strangling my guitar too much. Tried in V1, V2 and V3, same story.
It did sound good with fuzz/distortion pedals but I want to preserve the nice clean tone.

Not recommended for distorsion


Try them in ENGL E670 and E530 preamp with bad result, mid freq busted no bass freq, on clean sound in some amps it will be good but distorted sound fizzed, after many gain stages sound attack is lose. If close look inside - every tube have slightly different conductor geometry, some very close to each other, think its reason of bad sound. Very disappointed and NOT recommended it. Gold pin version and ECC83MG (mid gain) have more bass freq but distortion also not pleasant, original ENGL and cheap Bugera (12AX7B and C) way better in freq and with good distortion grain. Sorry for my english, not native, but hope for some one will be helpfully know about it.