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12AX7/ECC83 - Electro-Harmonix

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Item ID: 004458
Price: $12.95
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This Russian tube is full bodied and bright with a more straightforward presentation. It packs a lot of bite with its higher-than-normal gain. In overdrive, it offers a lot of crunchy fizz. High gain preamplifier tube with ultra low noise and detailed, musical tone. Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use AC on the filaments. For more information about our 12AX7 tubes, see our tech corner article on 12AX7s.

UPC/EAN: 683274020099

RoHS Compliant

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Product Reviews

4.44 out of 5 based on 9 reviews

I have a Marshall TSL602 and had a Mullard reissue 12ax7, cleans up very nicely, go out on V1 so I tried replacing it with what I had in my stock. I tried the EHX 12ax7 and found it to have alot of distortion on tap, very crunchy fizzy. This is good for my lead channel but the crunch channel had to be set to too much preamp to get it to sound natural, too much fizz and not enough crunch and ended up almost as distorted as the lead channel. The clean channel was something else entirely, the just starting to breakup crunch that the Mullard had was fizzy and not natural sounding. I took it out and settled on a Tung Sol 12ax7, better all around tube.

marred - August 26th, 2017

So much for the spiral filament reducing hum!The tube I ordered hummed like hell. I wish there were more concerned screening going on.

dts6587 - October 14th, 2016

Quality product. This tube sounds really good in my Marshall amp!

bruce jennings - April 4th, 2016

I have not had real good luck with guitar amplifier tubes in my Blues Jr. You can still find some RCAs around if you want to spend a fortune. I still have a good supply of RCA 6L6GCs but no 12AX7,12AT7, etc. I tried some Groove Tubes and some JJ Tesla because a lot of forums built them up. No thank you, never again. I re-tubed the amp with Electro Harmonix along with putting in a a bias adjustment and dropping the voltage so the tubes should last longer and changed out the speaker to a RED WHITE and BLUES Eminence. It is now one sweet amp. I have also had good luck with the higher grade Tung Sol 12AX7s which I put in my Fender Twin.

Michael Naylor - January 30th, 2016

The everyday gigging tube for my '64 Princeton 6G2 and my '75 Princeton Reverb.

Mickey Richard - July 1st, 2015

Great tubes for everyday use -- my goto gigging tube.

MickeyRichard - July 1st, 2015

This "WAS" our standard replacement 12AX7. They are okay, and have more treble than the Tung Sol RI, but they are not the best 12AX7 valve out there, by any means. To me they are a small step up from Sovtek. If you are on a budget and like the sound, fine. I am not very partial to these anymore. For a basic replacement valve we have gone over to the Chinese 12AX7A, and 12AX7B.

seb-ear-aaaaox.net - March 27th, 2015

Great little tubes

Linda Tabor - November 26th, 2014

Worked fine. Good shipping. May do business again.

Alan Andrews - November 16th, 2014

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