Tung-Sol 6550 No Cryo Reviews

4.8 Rating 33 Reviews

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2058 Wright Avenue
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Richard Kimberly Heck

Verified Reviewer

“I've used these for some time in a VTL MB-185 (original model). They seem to me to be the best of the current production 6550s---and, of course, I trust Upscale Audio to provide me with the best possible tubes.”

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Posted 3 years ago

Craig Parrott

Verified Reviewer

“Paired with nos RCA 7199 preamp tubes my ca. 1962 HH Scott LK-150 could not sound any better,but,it probably will over time.”

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Posted 3 years ago

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Posted 3 years ago

“Ken Davis was a great help making my tube selection. I laughed, I cried, I took his advice. I'm glad I did! But now I have 3 Prima Luna branded KT-88s. How can I use these or add a matching 4th? Thanks again'”

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Posted 4 years ago

“Tubes are performing as expected - they seemed to be pre-tested and matched. In any cases happy so far”

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Posted 4 years ago

“Run hot but superlative sound.”

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Posted 4 years ago

“Awesome sounding tubes my amp never sounded better”

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Posted 4 years ago

“Got a set of these (with cryo) and rolled them into my new Audio Research VT 80. Man, these are nice! I notice a slightly smaller, more forward soundstage than the KT 120's or 150's deliver. However, vocals are absolutely superb. Bass is not as pronounced, but it is controlled and tight. Highs are airy and NOT bright. I could listen to these for hours and hours. They will be my default tube for vocals and small-group instrumentals. Highly recommended.”

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Posted 7 years ago