Radiotechnique 12AU7 / 6189 Kevin's Stash / Yes Cryo Reviews

4.9 Rating 12 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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Bernie Villadiego

Verified Reviewer

“I was recommended this tube for my Odyssey Candela PreAmp. I've never tube rolled before and now I am a believer. This tube made my PreAmp more dynamic and more 3D sounding with a larger soundstage. I had a JJ tube that came with the unit. I am very happy with this product. Now I want to experiment with different tubes.”

Helpful Report

Posted 3 years ago

“2 of these, replaced the stock PL’s on my PL Prologue Premium as recommended by a upscale team member. It was a good call. The sound was warmer, more defined with fuller bass. Hard to believe really. You never think tube swapping can make such a big difference, but it does.”

Helpful Report

Posted 3 years ago

Craig Hinkel

Verified Reviewer

“Good Morning Kevin. I'm using the Radiotechnique 12AU7 in the pre amp section of my new EVO400 Integrated amp. I like the stock PL 12AU7's, but the Radiotechnique tubes help elevate the 3D effect this amp already has. Thanks Kevin. P.S. I based the purchased of my EVO 400 integrated amp from Stereoland, Bloomington MN. on your videos and customer feedback.”

Helpful Report

Posted 3 years ago

Laurence Segil

Verified Reviewer

“Excellent sound, but not quite up to Telefunken, but I think as good as any other tubes I have tried.”

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Posted 4 years ago

“Amazing straight out of the box. 30 hours in and they are the best I ever had...sparkling and very detailed.”

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Posted 4 years ago

“Located 2 of these front and center of my PL300 integrated amp. Very pleased with my system now.”

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Posted 4 years ago

MICHAEL KELLY

Verified Reviewer

“These tubes are incredibly detailed and cymbals sound like I am standing about a foot away when the drummer taps them. I can clearly hear the difference between high hat cymbals and the ones that have a more delayed "ching...." (I don't know what that is called). Good clear bass definition also. Overall response in my system is pretty flat - no obvious emphasis on bass, mids or treble. Just good clean "not sterile" really 3 dimensional sound. I appreciate the video, that's what convinced me to buy these and everything said in that video is totally spot on.”

1 Helpful Report

Posted 4 years ago

Brian Hudson

Verified Reviewer

“Immediately noticeable right out of the box, better detail and soundstage after about 100 hours of burn in. These replaced the OEM 12AU7s on the preamp section of my Primaluna EVO300. Very smooth and revealing response, exactly like Kevin’s YouTube video stated. Worth the money in my humble opinion!”

Helpful Report

Posted 4 years ago