Brimar CV4003 / 12AU7 Special CJ Test Grade / No Cryo Reviews

4.9 Rating 44 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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Steven Hinds

Verified Reviewer

“Best sounding preamp tubes I’ve heard yet”

Helpful Report

Posted 1 month ago

Ralph Cheney

Verified Reviewer

“Compared to the Primaluna, I noticed the mid range is a little more pronounced and the vocals, guitar, cymbols is more enjoyable where as before it was harsh now that I have heard the Brimars.”

Helpful Report

Posted 3 months ago

David Hoffman

Verified Reviewer

“Best sounding 12AU7!”

1 Helpful Report

Posted 6 months ago

Tony Leopold

Verified Reviewer

“The Brimar CV4003 tube delivers an intimate, emotionally engaging sound with a standout midrange. Vocals are forward, rich, and detailed, creating a haunting and captivating presence. As the tube burns in, the soundstage gains impressive depth and layering, though it's more intimate than wide. The highs are smooth with excellent detail, while the bass tightens over time, providing warmth and support without overpowering the mids. Overall, the Brimar offers a warm, musical sound making it a great choice for those seeking midrange magic and a deeply immersive experience. It is my driver tube of choice and I just bought a couple of spares to keep the music flowing over time.”

1 Helpful Report

Posted 7 months ago

Craig A Embry

Verified Reviewer

“Very nice tube. Ended up being a little warm for my system, but very nice!”

Helpful Report

Posted 1 year ago

“Using these Brimar tubes in the PrimaLuna Evo 400 preamp make a nice improvement over the stock tubes. Sound is richer and more musical, very detailed with a bit less bite, and perhaps slightly less extension, on the very top end. I'm still putting some hours on them before making final decisions, but they sound good already at 10 hours of run time.”

Helpful Report

Posted 1 year ago

Mark Boulter

Verified Reviewer

“I'm very happy with these tubes. They sound fantastic and are dead quiet - no hum.”

Helpful Report

Posted 1 year ago

Wayne Midkiff

Verified Reviewer

“These tubes are outstanding! Replaced the stock new EH 12AU7 that came in my Leben CS600X. The Leben sounded great with the originals, but the Brimar are a noticeable improvement. Worth the spend.”

Helpful Report

Posted 1 year ago