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.
Electro-Harmonix is rocking the vacuum tube community with the superior quality of the "EH" series tubes. Electro-Harmonix sound effects are world renown for the soulful warmth of their analog sound. This line of "EH" premium tubes continues in this tradition of classic tone.

Forget about Telefunken. The 12AX7EH provides high gain with low noise and detailed, musical tone that rivals the most desirable NOS types. Unique spiral filament eliminates filament to cathode induced hum common on amps that use AC on the filaments.
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 0.25 lbs
Shipping Dimensions: 3 x 1 x 1 in
Manufacturer Part Number (MPN): SOV 12AX7EH
EHX Warranty Non-New Electro-Harmonix product purchases are not covered by the manufacturer's warranty.
If you have additional warranty questions, please contact the manufacturer at 718-937-8300
(48 ratings)
Submitted March 16, 2019 by Mark R. Garner in Metairie, LA
"A Great Tube for the Micro Terror"
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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