JJ KT88 Power Vacuum Tube (Matched)

12 Reviews

Availability: Usually ships within 24 hours.

USD $‎61.95

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.

From our JJ KT88 vacuum tube listening test:
"The JJ KT88 power tube has the best imaging of all the tubes in this category. The bass is unique in that it compresses the very bottom end. This provides incredible bass response without ever losing control. Overall a great KT88 tube for orchestral, opera, and jazz music."

Other JJ Electronics tubesKT88 Tube Types

Additional Information and Downloads

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

JJ KT88 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

12 reviews

JJ KT88 | Better than expected….


Test strong, so far JJ-KT88 are holding bias. After 6 hours, top end opening up somewhat, bass very good (better than Preferred KT88). Nice sounding tube, hope they last.

JJ KT88 | thetubestore.com is a good place to buy from.


Solid tube, nice sound even for a relatively cheap tube. One of the JJ-KT88 tubes failed after around 50 hours of use though. Everyone gets a bad tube, or a few. It's normal for tubes. I gave a description of what happened with the bad tube and thetubestore quickly replied and offered an exchange or refund, no hassle.

Compared to more expensive tubes, it's not as good, but still solid. And I personally believe it's well worth it to spend more for better tubes. We spend thousands on amps, and then a hundred bucks on two tubes for them.. Which tube being used makes a big difference.

JJ KT88 | Very nice sound


I put a set of these JJ-KT88 in my Jolida 502P to replace Tungsol 6550 a few weeks ago and what a difference (more musical throughout without being muddy in the low end). I love the sound of these JJ's. I definitely will not hesitate to buy them again.

JJ KT88 | Perfect tube in every way

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Wonderful smooth JJ-KT88 across the board splitting hairs with Gold Lions either or no favorite here both in another league for audio and great with quicksilver new mono 60's

JJ KT88 | Great Tubes and value for money


I have been running 2 of these JJ-KT88 in my home built S.E.T amp (9 Watts) . They sound wonderful, I bought from the Tube Store some years ago. They sound great with 5" full range folded horns and on the old Wharfdale 9.6's (4 way I think). Definitely my best KT88's without spending $100's per tube