Genalex - Gold Lion KT88

7 Reviews
Best Seller

Availability: Usually ships within 24 hours.

USD $‎59.95
In 1957 Marconi-Osram Valve Co. (Genalex) introduced the "King of Power Tubes", the legendary Gold Lion KT88. This tube became the heart and soul of such classics as the Dynaco Mark III, McIntosh MC275, and Marshall Major. Unfortunately, Genalex ceased tube production in the early 1980s and the Genalex Gold Lion KT88 has become very expensive and hard to find. After extensive research and engineering, New Sensor Corp. has reissued the famed Genalex Gold Lion KT88. This tube has been recreated down to the finest detail with gold plated grid wire, carbonized screen grids, and a tri-alloy clad plate structure for exceptional performance and sound quality.

Other Genalex - Gold Lion tubesKT88 Tube Types

Additional Information and Downloads

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

Genalex - Gold Lion KT88 Datasheet (PDF)

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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

7 reviews

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Reliability is an issue with these!


Using these in a VTA ST-120.
Had one tube fail right at 90 days.
Came here and bought replacements.
6 months later, another one red plating again.
Tubes going into meltdown scare the daylights out of me, I don't want a house fire!
I'm done with kt88's.

stunning clarity


Replaced the original KT88s in my Prima Luna Prologue 5 power amp with a set of these recently. HUGE improvement. Extraordinary detail. Stunning bass. Very deep. Using Martin Logan 35's. Vincent hybrid pre amp. CDs with Schiit multibit DAC. Tubes need a 72 hour burn in. I do not think it can get any better in a KT88! Very cordial and informed staff at The Tube Store.