10 Reviews
Best Seller

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USD $‎55.95
From our JJ KT88 tube listening test:
"The JJ KT88 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

10 reviews

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Follow Up Review


I can only give these tubes a ten because the scale does not allow for more. If it did I would rate them much higher.

The description of these tubes is accurate! Vocals are liquid and palpably present. Excellent detail and very transparent but never harsh. Dynamic and engaging.

The sound stage is excellent however the perspective is of being in one of front 3 rows, centre position.

If the associated components are up to the task these will produce very good results. If the results are not as described look elsewhere in your system for deficiencies.

Solid Performance


There's nothing bad to say about these tubes. They have an organic punchy tone in my bass amp. Not edgy at all.

Great Tubes and value for money


I have been running 2 of these JJ's 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 KT 88's without spending $100's per tube

perfect tube in every way

by -

wonderful smooth 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

Very nice sound


I put a set of these 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.