Electro-Harmonix 12AX7EH Preamp Tube
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Electro-Harmonix 12AX7EH Preamp Tube

Electro-Harmonix gives distortion junkies all the gain they can handle without unwanted noise, thanks to a unique spiral filament in the 12AX7ED preamp tube.

Overall User Ratings (based on 50 ratings)
Overall:
5 out of 5 stars
Sound:
5 out of 5 stars
Features:
5 out of 5 stars
Ease of Use:
5 out of 5 stars
Quality:
5 out of 5 stars
Value:
5 out of 5 stars
Manufacturer Support:
5 out of 5 stars
The Wow Factor:
5 out of 5 stars
Overall: 5 out of 5 stars
(50)
Submitted March 16, 2019 by Mark R. Garner in Metairie, LA
"A Great Tube for the Micro Terror"
Overall: 5 out of 5 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I recently bought a used Orange Micro Terror head but I wasn't overly impressed wit the tone.I expected more. There was an audible buzz when the gain was cranked and the tone seemed sorta flat.I did some research and found some similar observations from others.A tube swap was the consensus verdict and many recommended the EHX 12AX7.I ordered this tube from zZounds and for an extra $1.99 I had it the very next day.After swapping tubes I have to say the improvement was IMMEDIATELY noticeable. The gain was boosted a bit but the most noticeable improvement was in the tone. T'was "more better".I tested the amp with an HSH Strat in all nine possible settings and it was "totally rad, dude"!I'm a novice when it comes to tube swaps so I have to rely on the advice of others. In this case I wasn't misled.This is a great replacement tube for the Micro Terror.
Musical Background:
Former semi-pro now a stay-at-home jammer.
Musical Style:
Rock, rock and rock.
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Submitted July 28, 2021 by a customer from outlook.com
"Just, Wow!"
Overall: 5 out of 5 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I have the deluxe Reverb reissue. 68'. Shortly after receiving I upgraded the speaker to the Eminence Swamp Thing. That was an immediate Improvement over the stock speaker, which by the way sounds great in a different amp. But back to the tubes I originally replaced all the preamp tubes with JJ's and it was just all right. One of the JJ's must have went bad oh, and I put the groove tubes back in. Still wasn't feeling it oh, so I ordered these 12ax7 EH's. There it is! Wow just wow! Night and day difference in the sound coming out of the amp. Fuller Bodied and nice break up! And thick just how I like it. I highly recommend these as an inexpensive Step Up, after a speaker upgrade of course in most stock amps. By the way still running the Groove Tube Power Amp tubes oh, but I have read these do not affect it sounds so much so I will wait until it is necessary to replace them.
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Submitted August 12, 2003 by a customer from hotmail.com
"Why pay so much for NOS tubes?????"
Overall: 4.5 out of 5 stars
My musical goal is never ending but I can live with these babes for quite a while...
Sound
Very musical,top end perfect-not bright just right,mid range is upfront,mid bass is good but prefer a little bit more,bottom end tight and detail.Staging is wide, deep and well balance. Music reproduction for live and recording is accurate and honest. Biggest improvement in my triode amp with Brotish loudspeaker is the attack. Man,this tubes are pretty fast.
Quality
Well made
Value
The best money can buy especially when compare to NOS!
The Wow Factor
The logo is pretty cool.
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Submitted September 7, 2021 by a customer from gmail.com
"Great value"
Overall: 5 out of 5 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
Bought these to redo the preamp section of my trusty 91 peavey ultra 60. Very impressed with these. Put 3 of these in and a mullard for the phase inverter. Back in heavy metal heaven.
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