EL34 Electro Harmonix Power Pentode

Available in single, matched pairs and matched quad

Electro Harmonix has become known for producing quality tubes and is definitely a brand favoured by a lot of our customers. 

All tubes are tested and matched (even the singles are separated matched pairs)

A beam pentode tube with an octal base, the EL34 tube (valve) is one of the original workhorses for musicians and HiFi aficionados.  Developed in the 1050's by Mullard they soon become very popular with audio manufacturers 

What equivalents exist?

EL34 tubes are equivalent to

  • 6CA7 developed by Sylvania to be compatible with the EL34. 
  • KT77 GEC originally developed this tube to rival the EL34 and some say its the best version of all the EL34 models
  • CV1741 is a NOS version of the EL34 range.

What should I use in my amp?

There is no easy answer for this, "sound is personal" as I say again and again.

I personally think the EL34 range work across both guitar amps and Hi-Fi units whereas the 6CA7 and KT77 are slightly better suited for HiFi units.

Why? Simply the 6CA7 and KT77 tubes have a bigger bottom end, they are more open in their sound whereas the EL34 tend to be a bit more focused.

Whilst all will work, you will find that more guitarist use El34 tubes and more HiFi enthusiasts tend to buy KT77 or 6CA7 tubes,

For more information try reading this Wikipedia page

SKU el34eh
Brand Electro Harmonix
Shipping Weight 0.3000kg
Shipping Width 0.100m
Shipping Height 0.050m
Shipping Length 0.140m
Unit Of Measure ea


6 August 2019
These tubes were exactly as expected with fast delivery! A huge improvement on the stock EL34B’s in my Vox NT50HG2

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