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ElectroHarmonix EL34 - precision matched

ElectroHarmonix EL34
Manufacturer: electro harmonix

The Electro-Harmonix EL34EH is a great choice for vintage gear and many current production OEMs use relabeled Electro-Harmonix vacuum tubes in their amplifiers. According to the technical journal, Vacuum Tube Valley, “The Electro-Harmonix EL34EH is balanced throughout the entire music spectrum. Bass goes deep and is tight, mids are sweet and well defined, and highs are detailed and extended.” These tubes are also recommended by VTL for use in their amps. If you want great sounding EL34 tubes at a very reasonable price, then these should be on your list. 


These tubes have been burned in and tested at typical operating voltages on a laboratory grade Amplitrex AT1000 (manual setting, fixed bias mode). They are precisely matched for both current draw (mA) and transconductance (Gm). Learn more about our burn-in and testing process here


Price is for a single tube and includes burn-in and standard matching service. Tubes ship in ElectroHarmonix retail boxes.

Precision Power Tube Matching

Our power tubes are burned in and then tested on a laboratory grade Amplitrex AT1000 tube tester. We match tubes for both current draw (mA) and transconductance (Gm) at typical operating conditions (plate: 500V, screen: 450V, grid bias: -41.5V).

After burn in and testing, we hand select and custom match every power tube order we receive. To do this, each power tube set is also run on a custom, fully variable test fixture that can match the operating conditions of your amplifier based on the information you provide below. This enables us to do a final check of the power tube set's performance and matching under load. Why this matters
1. What is the manufacturer and model of your amplifier?
2. How is your amp biased?   Why we ask
3. Matching notes   Why we ask
If you know the plate, screen, and grid bias voltages your amplifier uses, please note them in the comments section when you check out and we will use this information when we select and match your power tube set. (If you don't know, don't worry--we can make an educated guess based on your amp's make and model, if we don't already know the voltages it uses.) If you are a guitarist, you can also specify if you prefer early or late breakup. Thanks!


Price per single tube: $20.00

Enter total number of tubes needed for your matched set

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