JJ ECC83-S / 12AX7

27 Reviews
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USD $‎12.95
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."

Other JJ Electronics tubes12AX7 Types

Additional Information and Downloads

12AX7 Tube Review

Tube Matching Information:
Matched Sections Service

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.

JJ ECC83-s


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.

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.

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!

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.

Very satisfied


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.