Radiotechnique 12AU7 / 6189 Platinum Grade / No Cryo Reviews

4.8 Rating 38 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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“Picked up two of these babies to replace the front center tubes on my Primaluna Evo 300 all-tube integrated amp. Driving a pair of Klipsch Cornwall IV speakers. Here is my impression: 1. There was an immediate difference in sound. 2. The mids sound natural and a bit more recessed, which is exactly what I wanted because the horn midranges on my Cornwalll IV’s are a bit forward for my taste. In fact, I had been reducing the mids slightly with an equalizer. No more need for that. 3. The highs are extended and have a bit more texture. Very smooth, but I can hear a little sizzle off the symbols. There seems to be a little more detail. 4. Bass isn’t much changed - still strong and maybe a bit tighter. It was very cool to open up a box with brand new 60 year-old tubes. Felt like opening a time capsule. I have about 50 hours on the tubes now, and they seem to be settling in and still improving. Overall, very satisfied.”

Helpful Report

Posted 1 week ago

Michael Slattery

Unverified Reviewer

“Nice Tubes fully enjoyable in my system brought the midrange detail and vocals more pronounced in a very nice way.”

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Posted 3 months ago

Daniel Stewart

Verified Reviewer

“Really nice sounding tubes..Added a little more vocal sweetness to my preamp. Very nice set. And Sean and Kevin are just great to work with. Helpful and knowledgable.”

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Posted 4 months ago

Philip HINDS

Verified Reviewer

Author didn't leave any comments.

Helpful Report

Posted 5 months ago

Taggart Williamson

Verified Reviewer

“Very happy with the improvement. Watch Kevin’s video on these. They are everything he describes and then some. Using in EVO 400 power amp.”

1 Helpful Report

Posted 1 year ago

Derryl Durden

Verified Reviewer

“3rd set of 12au7 replacing original Prmaluna tubes, that shipped with my ebook 400 preamplifiier. Subtle improvement in soundstage width, and inner details. Incremental to the original rolling of the 1st set. I'll be buying the 4th set of two next month!”