Loading... Please wait...Gold Lion KT-88 - Russian re-issue of the legendary Genalex KT88. These guys rock... They've been working great in all applications we've tried them in, and haven't had a single complaint. Read web forums and you'll see tons of praise for this tube. Sound is beautifully balanced... airy highs, gorgeous mids, deep dynamic bass. I know we shouldn't care about looks... but who am I kiddin'... with the side getters and Genalex-inspired silkscreening... they look bitchin' too!
Pricing above is for a single tube. Includes matching in any quantity you need at no extra charge.
All power tubes are Platinum Screened & Tested to the highest standards, including a 72-hour burn in process, and testing at real-world voltages.
Posted by SC Bailey
I had been using Penta KT88SC's in my PL 5 which were a very nice upgrade from the stock tubes. One went bad so I put in the Gold Lion KT88 re-issues. Wow...more bass, dimension, sound stage across the board. I've not tried any NOS power tubes (are there any) so this may be the best tube for the PL 5! It's like I have a new system and I can't stop listening.
My system: Pro Logue 3 Pre with Mazda chrome 12 ax7s and Radiotechnique 12au7s, Pro Logue 5 with Gold Lion KT88's, Mullard 12au7s, Tungsol 12ax7 re-issue's, Njoeb Tjoeb cdp with upsampler board and Ediswan 6922's. Quad ESL 63's rebuilt to new standards. Except for the Quads, you could call this an Uncle Kev special.
Most of you already know that Upscale Audio is the premier destination for expertise and availability of vacuum tubes for high-end audio equipment. So when we offer servies and options, you can be guaranteed that it represents a significant investment of research and capital, and that the end result will greatly enhance your listening experience.
Upscale has contracted with the foremost company involved in this technology, 300 Below, to treat our most popular tubes. Other tubes will be added as time allows, but it is a time consuming proccess. Our intention is to have most stocks Cryogenically treated before we even test them.

Of course, your first question is – and should be – why? In a nutshell, reducing an object’s temperature to -300ºF re-arranges its molecular structure, creating greater uniformity that results in longer life and better performance than when the product was initially designed.With vacuum tubes, this process has a profound impact on a tube’s ability to endure thermal shock. Therefore, tubes can last longer and their sound can been enhanced in ways that are simply exquisite.
After thoughtful and thorough research, Upscale Audio chose 300 Below because of their extensive experience in working with musical instruments as well as auto racing, metal tooling, and high-end sporting goods from rifle barrels to golf clubs. Expect nothing but the best from Upscale Audio.
Our charge for Cryogenically treating tubes is a fraction of what others charge, though we use the premier company. Count on Upscale to do the best job and not price gouge . Also available is cryogenic treatment for cables, along with our well-known Nordost Vidar cable treatment system. Call for details. Pricing is listed on each tube and cable page.
Vacuum tubes are warranted for 90 days against defects, except in cases of abuse, and replaced with like-item only.
Vacuum tubes are warranted for 90 days against defects, except in cases of abuse, and replaced with like-item only.
Exceptions to our warranty policy are as follows:
Upscale Audio is not liable for any damage or injury caused by the improper use of its tubes or the use of an incorrect/incompatible tube type. If you are unsure of what tube or tubes your equipment uses, consult the manufacturer before making a purchase. Using an incompatible tube type may cause severe damage to your equipment and will void your tube's warranty.
Vacuum tubes are electronic parts and are not refundable under any circumstances.