Gold Lion KT77 / EL34 Yes Cryo Reviews

4.6 Rating 38 Reviews
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Clarence Boggs
Verified Reviewer
Love these, better than my Golden Lion KT88s, took a few hours to burn in but well worth the wait, and for the price you can’t beat them
1 Helpful Report
Posted 3 years ago
Addendum after 10 months: No problems. Still sound beautiful! For "fun" I again listened to KT66: nice but that's all, KT88: excellent but not quite the full-bodied presentation of KT77. I'm now feeling quite comfortable with the Upscale Cyro KT77. The sound, in my rig, is simply beautiful and closely reminds me of what I hear in live music (I'm an orchestra player.) Original post: My second set of GL KT77. Although the first set had a failure at 8 months, after returning to the stock EL 34 and trying a set of KT66, I decided to take a chance on KT77 again. The sound is simply beautiful in my system (EVO 300 Integrated and Cheviot). There is both fullness of body and crystal transparency to the images. This time I chose cyro in the hope the process weeds out some material defects. This set started out sounding better than the first set did, much less time to full bloom. As the website currently notes reliability has declined but the sound is so wonderful I remain hopeful and I have three spares remaining from the first set. Please note in my system with these tubes, not with EL34 or KT66, there is a noticeable mild pop during warm-up from cold when the B+ relay clicks. I have been assured this is normal and has to do with the heaters not being warm enough.
2 Helpful Report
Posted 3 years ago
Isaac Cardona
Verified Reviewer
Author didn't leave any comments.
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Posted 3 years ago
Greg Thrasher
Verified Reviewer
Author didn't leave any comments.
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Posted 3 years ago
Really works well in Mystere PA21
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Posted 3 years ago
Author didn't leave any comments.
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Posted 3 years ago
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Posted 3 years ago
Gregory Brigman
Verified Reviewer
Haven’t installed yet. Backups for KT88s. Will try soon and let you know. Arrived in perfect condition.
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Posted 3 years ago