Brimar CV4003 / 12AU7 Platinum Grade / No Cryo Reviews

4.9 Rating 157 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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Daniel Geiger

Verified Reviewer

“Sounds good, but have not even tried it against the stock tube. The cryo treatment seems to be hyped by Upscale audio, but appears to be audio snake oil. Google around a bit and you will find lack of any changes in comparative listening double blind tests. From a material science perspective, cryo makes no sense either, except for really bad tubes getting destroyed by strong temperature gradients.”

2 Helpful Report

Posted 6 years ago

“Ordered a matched quad of the CJ Special Test grade to try in my Rogue Audio RP-7 preamp. I think the stock JJ 802 tubes sound excellent, especially for the cost. Have about 50 hours on these Brimars and there was certainly a change for the better from initial installation to this point. Very nice soundstage, no harshness at all in the treble, and just a very clean and clear musical presentation.”

Helpful Report

Posted 6 years ago

Thomas Gisonti

Verified Reviewer

Author didn't leave any comments.

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Posted 6 years ago

Humberto Ramirez

Unverified Reviewer

“Stunning performance. I already had some vintage Mullards but these just blew them out of the water. Big super tight bottom, upfront mids and sheer smooth highs. Totally in love with these.”

2 Helpful Report

Posted 6 years ago

Richard Reavis

Verified Reviewer

Author didn't leave any comments.

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Posted 6 years ago

“There was significant improvement from my Rogers PA-2 Phono Preamp when I switched to the Brimars. Really exceptional.”