Brimar CV4003 / 12AU7 Platinum Grade / No Cryo Reviews

4.9 Rating 147 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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“These were awesome in my HP. After more breakin time for new EVO-400 will probably be swapped in. Enjoy the laid back sound.”

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Posted 4 years ago

Scott Lamitie

Verified Reviewer

“Very nice full rich open sound.”

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Posted 4 years ago

Philip Brosemer

Verified Reviewer

“Everything I own with 12AU tubes gets the Brimar CV4403 upgrade as sonn as possible. They give me the sound I love out of tube gear.”

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Posted 4 years ago

“Couldn’t be more complimentary of Uscald service”

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Posted 4 years ago

“Couldn’t be more complimentary of Uscald service”

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Posted 4 years ago

George Stadtlander

Verified Reviewer

“Upscale does a fantastic job. I simply couldn’t believe how good the sound improved”

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Posted 4 years ago

“So far so good. I acquired a Rogue RP5 preamp several months ago. It came stock with some Chinese JJs. I replaced those fairly quickly with 4 RCA Clear Tops (these were labeled CONN and I'm certain were salvaged from an old organ). I had a couple of "problem" LPs that were greatly improved by the RCA tubes. Fresh off that experience, I thought I'd try to step up a bit more an ordered these based on positive reviews (mainly from Upscale Audio) and the fact they were more affordable than some of the grail tubes (Mullard, Telefunken, etc). I've only had then playing for about an hour but they are an improvement over the RCAs. I would say the improvement, so far, is not as dramatic as going from the JJs to the RCAs but it is early. I'll report back after 100 hours or so...”