Brimar CV4003 / 12AU7 Special CJ Test Grade / Yes Cryo Reviews

4.7 Rating 38 Reviews

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909.931.9686

Location:

2058 Wright Avenue,
2058 Wright Avenue
California
91750

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Everett Campbell

Verified Reviewer

“Not rating the product itself! It didn’t work with my system! Those tubes in the VTL 2.5 preamp, were terrible!!!!! The sound was unbearably bright and glaring. I had to replace them and will sell them ASAP!”

Helpful Report

Posted 2 years ago

Daniel Frenette

Verified Reviewer

“I am very disappointed with the BRIMAR 12AU7 lamp. You presented this tube as perfectly suited to CONRAD-JOHNSON amplifiers, and yet... the sound is at best, warm and honeyed, while restrained as if swimming in marshmallow. The original Yugoslavian 12AU7 lamp that comes with the CONRAD-JOHNSON CAV 50 amplifier is far superior. Much more natural, transparent and without "English" color like this BRIMAR from the sixties. I believe nostalgia convinced you it was a good buy. I can confirm that it is not. I am currently preparing an ad to resell it used ... for a hundred hours. I'll easily lose $ 100 for taking your equally colorful advice ...”

2 Helpful Report

Posted 3 years ago

Scott Lamitie

Verified Reviewer

“Beautiful full sound top to bottom, great detail, no glare. Best AU7 I have found for my EVO-400 and I have tried quite a few.”

Helpful Report

Posted 3 years ago

“I replaced all three JJ 12AU7 tubes in my Rogue CM ii with the Brimar CV4003s (best of the best matched set). They where a big jump over the stock tubes right from the start. These tubes were dead silent, smooth and the music was sweet. However, an intermittent popping sound appeared after approximately 50 hours of play. The center tube failed and had to be replaced with the original JJ tube. Brimar is not a bad product, I just got a bad tube. The hard part is ordering one that matches the other two.”

1 Helpful Report

Posted 3 years ago

“After one of my previous Brimars went bad I put all my previous tube experiments back into Rogue Sphinx v3 and nope, I knew I needed 3more, one to replace the previous one and a backup pair. Beautiful! So thanks Kevin I’m a happy customer. Break out some more 12AU7s man!”

Helpful Report

Posted 3 years ago

Irving Adams

Verified Reviewer

“Better sound,fuller base with weight, deeper sound stage...nice people to work with....thank you”

Helpful Report

Posted 3 years ago

“I love the Brimar tubes in my Rogue Pharaoh amp. I believe the cryo treatment provides a crisper, more defined sound.”