Electro-Harmonix 6CA7EH Power Vacuum Tube (Matched)

16 Reviews

Availability: Usually ships within 24 hours.

USD $‎43.95

Need matched power tubes? Don't worry! Price includes matching in any quantity you need for no extra charge. Need a matched pair? Just order "2" tubes. For a matched quad order "4" tubes. Matched sextets and octets are available as well.

Designed to the exacting specifications of the Philips 6CA7 vacuum tube, this classic tetrode returns to life in a big bottle design. The Electro Harmonix 6CA7 power tube is built to withstand today's high-gain amps while still retaining the detailed tone and component integrity of the original. The 6CA7-EH A direct replacement, with military reliability, for any EL34.

From our review, "These tubes sound every bit as good as the old EI tubes and are probably my favorite tubes for Hiwatt guitar amplifiers."

Other Electro-Harmonix tubesEL34 Tube Types

Additional Information and Downloads

EL34 Tube Review

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

Electro-Harmonix 6CA7EH Datasheet (PDF)

Download Adobe Acrobat PDF reader

Warranty Information and Return Policy

Warranty Period: 3 months

All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

These guidelines may be updated without notice.

Ratings & Reviews

16 reviews

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Electro-Harmonix 6CA7EH | Good all rounder

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I have a pair of these EH-6CA7 in a hot rodded JCM 800 slo mash up type amp I build and so far there hanging in there pretty decent. I run the gain around half and these clean up really nice with a tele or strat and get very nice full bodied cleans or nice overdrive with the volume up. With humbuckers they also clean up nice but add a boost or overdrive and they do thick percussive chug very well. They are fatter and more mid scooped than an EL34 but i really like them so far and are great for clean and dirt. They are different than a typical EL34 but very nice and worth a try if your looking for something different. I plan on keeping them in the amp and hopefully they last longer than modern EL34 tubes generally do with heavy use.

Electro-Harmonix 6CA7EH | The poor man's KT88

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Was sad when a quad of EH KT88 being used in my Jolida started to fail, and recent pricing has made their replacements very dear. Has previously had a set of EH EL34, but found them simply unsuitable for the crunchy, bassy rock I listen to.

Hearing good things about these EH-6CA7 tubes, I ordered a quad and was very pleased. Although they were more recessed in the mids, with a slight bit less presence, their overall sound signature was a KT88 "light". Most of the good stuff was still there.

I rolled in a set of JJ 6CA7 to compare, and the differences were immediate and apparent. I could see the JJ sounding excellent in a guitar amp when crunch and dark tone is important. But not as well-suited for stereo listening.

Highly recommended for those on a budget.

Electro-Harmonix 6CA7EH | EH 6CA7


Great tube that takes you from 6L6 to high gain EVH territory and very reliable!

Electro-Harmonix 6CA7EH | Too Hot to Handle


I tried these EH-6CA7 in my old Heathkit 40 watt amplifier. They do sound very good, but these take more current so the power transformer runs hotter. To hot to touch after an hour, So I put the old Ei 6CA7s back in.

Note from thetubestore: The 6CA7EH tubes are similar to EL34 tubes and have a wide range of natural current draw. Many will run hotter if the amp is not rebiased. Assuming they are biased the same as other tubes, they will not run hotter.

Electro-Harmonix 6CA7EH | Great choice

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First Of all… excellent customer service and shipping speed was outstanding!
These EH-6CA7 really woke up my 91 JCM900 50 watt. Tone is great. Attack is more pronounced. Very satisfied!!