Radiotechnique 12AU7 / 6189 Platinum Grade / No Cryo Reviews

4.8 Rating 40 Reviews

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Phone:

909.931.9686

Email:

joel.m@upscaleaudio.com

Location:

2058 Wright Avenue,
2058 Wright Avenue
California
91750

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Francois Cossette

Verified Reviewer

“Great sounding tubes. Quick delivery and good advice from Upscale staff !!”

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Posted 4 years ago

“Currently in the pre-amp section of my Rogue Audio Cronus Magnum 2. A gorgeous tube. Lives up to the hype of prior reviews posted here.”

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Posted 4 years ago

“This is what I would characterize as being a poised and composed tube. For my Cornwall 4 speakers with their at times slightly over assertive horns the 6189’s calm them down without tamping them down. This tube also loves string instruments whether acoustic or electronically amplified, and it also takes the edge off of certain female vocalists such Gillian Welch whose album “Harrow and Harvest” Is one of my reference albums of music for running any new tube through its paces. All in all, I can heartily recommend the 6189 as a great all-rounder. I bought these platinum matched, and they do sound very well matched indeed.”

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Posted 5 years ago

James Sweeney

Verified Reviewer

“Sweet, best sounding tubes I've heard yet. RT 6189/12au7”

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Posted 5 years ago

“Just as the qualities of these tubes were generally described, with about 150 hours of burn-in I'm hearing excellent changes in the soundstage, detail, warmth, bass extension, and softening of some glare I had in the upper range. This was my first excursion into tube rolling, and it was a clear improvement. Thanks for the excellent help.”

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Posted 5 years ago

“I replaced the stock tubes in my PS Audio BHK preamp with these. There was a very slight improvement in textures with these tubes, but on the negative side the texture sounds a little zingy and unnatural at times. Also they are not a matched set, so my balance is off by a fair amount. I think I will put my stock tubes back into the unit.”

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Posted 5 years ago

Carroll Watts

Verified Reviewer

“Put the two 'new' tubes in my PrimaLuna amp and was surprised at the difference they made. Clear improvement in sound stage, greater clarity overall. Pricey but worth it to me! Thanks!”

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Posted 5 years ago

Timothy Shultz

Verified Reviewer

“I added these to my Primaluna400 in the center front two slots. Wow, what a nice pair of tubes. Very airy in the highs. Couldn't be more pleased. Upscale was also quick to ship and packed them very well.”

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Posted 5 years ago