Electro-Harmonix 12AX7 Preamp Tube Demo

Name: Electro-Harmonix 12AX7 Preamp Tube
Brand: Electro-Harmonix
Rating: 4 (4 reviews)

Replacement 12AX7/ECC83 Preamplifier Tube

4 reviews Write your review Item ID: 12AX7EHd3

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.46 (each)

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.49

New for $24.95

Condition Notes:

This item is in excellent condition and is in perfect working order. Includes all original accessories. This item ships in upgraded Sweetwater packaging.

The images shown do not necessarily represent the condition of this particular item.

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Electro-Harmonix 12AX7 Preamp Tube

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Excellent All-around Preamp Tube

Searching for a top-shelf replacement preamp tube for your high-gain guitar amplifier? This excellent 12AX7 vacuum tube from Electro-Harmonix boasts a high-gain, low-plate-current, dual-triode design. At Sweetwater, we've found that this tube yields extremely low noise, due to its unique spiral filament, which makes short work of annoying cathode-to-filament induced hum. If you're in need of a high-performing preamplifier vacuum tube, the EHX 12AX7 is a great all-around choice.

Electro-Harmonix 12AX7 Preamp Tube Features:

A top-shelf replacement preamp tube for 12AX7/ECC83-loaded guitar amplifiers
Boasts a high-gain, low-plate-current, dual-triode design
Excels in high-gain applications
Unique spiral filament makes short work of cathode-to-filament induced hum
Many OEMs use relabeled Electro-Harmonix vacuum tubes in their amplifiers

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At Sweetwater, we're so picky that what we call a "demo" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

What demo means to us is that we've had it out of the box, or maybe it was in a customer's hands for a few days and isn't "factory fresh" as a result. Every demo item we sell has Sweetwater's 2-year Total Confidence Coverage™ warranty, and has been tested and verified up to "new" specs by our factory-authorized technicians to make sure it's in perfect working order before we ship it to you.

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Additional Media

Guitar Amp Buying Guide

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Tech Specs

Type: Preamp
Model: 12AX7/ECC83
Quantity: Single
Manufacturer Part Number: 12AX7EH

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I've had fine results with Electro Harmonix tubes before and trust there quality control. Unfortunately these are a little larger diameter than
the stock tube on my Vintage Champ and do not fit into the socket. No worries I can use this in a different Fender Amp. I will be sure to request Chris Leonards assistance when I order another brand. Tube dimensions do not appear to be specified anywhere.

Very good as always have been

These are one of my favorite options for new tubes. I've had it in my amp for hours and hours of playing so far all is well.

I switched out a Mesa 12AX7 tube for this Electro-Harmonix 12AX7 in a Marshall Valvestate 8100...I liked the Mesa but wanted to try something else...First EH lasted 15 minutes after install...contacted Sweetwater and they sent a replacement free of charge...Installed the second one and it lasted about 45 minutes before just slowly dying out....Put the Mesa back in and it works fine with no issues...could it be 2 bad tubes or something else...not sure...didn't try to get another one after the second one failed...While it worked it did sound amazing with great sustain!

See also: Amp Tubes, Electro-Harmonix, Electro-Harmonix Guitar Amp Tubes

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Electro-Harmonix 12AX7 Preamp Tube Demo

Condition Notes:

Ask An Expert

Most Popular Accessories & Related Items

Excellent All-around Preamp Tube

Electro-Harmonix 12AX7 Preamp Tube Features:

What is Demo Gear?

When you buy a Demo item at Sweetwater, you get:

Additional Media

Tech Specs

What Makes Our Sales Engineers Great?

Customer Reviews

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Customer Added Media

Large diameter.

Original

One of my fav 12ax7

Doesn't last