6CA7 Electro Harmonix Power Tetrode

Also known as EL34 or KT77

Electro Harmonix has designed these 6CA7 power tubes to exact specifications as the original Philips 6CA7. A big bottle classic tetrode built to provide high gain amps a tube that can handle the treatment while still providing detailed tone.

Essential a military grade version of the EL34 can be used as a direct replacement.

Available in

  • Single
  • Matched Pairs
  • Matched Quads
SKU 6ca7eh
Brand electro Harmonix
Unit Of Measure ea

Recommended for Primaluna

22 February 2021
I rolled these in to my Primaluna EVO 400 to replace the stock EL34 which I had been listening to for a few months. The stock EL34’s have a sweet but very forward midrange, with fast bass albeit not a lot of body and weight, and a smooth top end that’s a little rolled off. The EH 6CA7’s have a much more balanced presentation top to bottom, really nice highs a touch more pronounced without harshness, midrange excellent though not as forward and sweet - a bit more matter of fact, and the bass has really impressed me, considerably more weight and fullness but very detailed. Really happy with these power tubes as an alternative to the stock el34’s and shopping with Evatco was pleasant and easy.

Good deal

17 May 2018
Liked quality of the product and delivery speed - all as expected! Will keep shopping with Evatco.

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