JJ EL84 / 6BQ5

10 Reviews

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USD $‎19.95
1 – 4USD $‎19.95
5 – 99USD $‎18.95
From our review of this EL84 tube: "With the JJ EL84 tube you seem to get a compromise between tone and reliability. Nice mids, sparkling highs and solid bottom end characterize this tube. From a construction standpoint I think JJ has hit the mark. As with any EL84 tube they can be prone to mechanical noise in combo amps. However, they seem to take the heat and vibration in stride without any negative tonal effects. In the AC30 the JJ EL84 tube will really deliver the VOX chime with lots of swirl and shimmery harmonic content. In the little Pro Junior just crank it up and you get a great, nasty, overdriven sound."

These are the same tubes that Groove Tubes relabels as GT-EL84-S.

Other JJ Electronics tubes

Additional Information and Downloads

EL84 Tube Review

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

JJ EL84 / 6BQ5 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.

Solid choice


This has become my default upgrade for stock EL84s after using them in 4 or 5 amps; performs well with zero reliability or significant noise issues in all cases. To my ear, there is a bit of prominence to the high mids evident in some mid-high gain applications. Recent test confirms they sound basically the same as they did ten years ago.

Very nice, if a little inconsistent


I've gone through multiple sets of the JJs and have used them in my two primary amplifiers: a Vox AC30 and a Peavey Classic 50. The sound is simply magical in the AC30, with lush sparkling highs and nicely balanced lows. The Classic 50 benefits from the tubes as well, though not quite so much as in the AC30. The highs are there, but lows in the Classic 50 seem punchier and more ballsy when using the cheaper Sovtek tubes. What is peculiar is the variation from set to set I've experienced with the JJs. The first two I got were fantastic, but the third seemed weak comparatively. Still, I would definitely recommend using these tubes in an AC30, and I think they are a superb value considering the balance of price, performance and lifespan.

Great Go-To EL84


I have lots of these floating around in my EL84 amps... they sound great, hold up well, and have been good quality. Gibson GA-5 reissue and Crate VC50 are sporting them now... Put them in Epiphone Electar in the past....
5 Stars for Value.....

Mesa Express 5:25


Just put these in and the volume is much louder and articulate. Mentioned that I had an Express 5:25 in the order notes putting the matched bias in the hands of TheTubeStore and I guess they nailed it. Wow! Thanks.

Taming Taz


Hi! My Carvin V3M arrived with a tone that was disappointing. First off, it's designed for modern rock and is very gainy and bright. I need a smooth 70's "brown sound" but it was a gift so I couldn't return it. It looked too cool to return anyway. All the tubes contributed to making the tone lackluster, so I completely retubed the amp, mostly with JJ's, after reading my way through thetubestore.com. The stock Sovtek EL84's went out to the curb with the others. Now it's a different amp. It still wants to have that Boogie Duel Recto "kaCHANG!* at 3K but I knocked that down with the EQ in my multi effects and it's perfect. I wouldn't know if the whole retubing worked or not if the power tubes weren't great. I'm getting a ton of harmonic complexity and very little noise. Taz and I are friends, now.