Brimar CV4003 / 12AU7 Platinum Grade / Yes Cryo Reviews

5 Rating 59 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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William Melillo

Verified Reviewer

“utterly fantastic tube. Used in the cathode follower stage of an all triode RIAA that is very revealing, and this tube does not disappoint.”

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Posted 5 years ago

Steve Prescott

Verified Reviewer

“These have made the biggest improvements than any other tube I’ve tried in my primaluna evo 300 preamp. They have removed the little bit of harshness I was gettingvwith my Cornwall 3’s. There is much more instrument separation, more detail, a smoother top end, and more bottom end. One tube came to me cracked but Upscale quickly fixed that and sent me another.”

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Posted 5 years ago

Craig Bressler

Verified Reviewer

“luv this tube!”

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Posted 5 years ago

David Morris

Verified Reviewer

Author didn't leave any comments.

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Posted 5 years ago

Chet McHenry

Verified Reviewer

“Was curious to try these based on other reviews so I bought two and replaced the two stock inside preamp tubes on my Primaluna Evo 400. With my very revealing Tannoy Stirling GR speakers, these tubes are ideal for letting more of the sweetness and detail come through and more importantly the edginess I heard at higher volume disappeared. I bought another pair as back up. Highly recommended.”

Helpful Report

Posted 5 years ago

Michael Pride

Verified Reviewer

“I’m still burning them in but they were quieter than the stock tubes immediately. The sound is smoother and less forward with a bit more air in the first position on my Primaluna preamp.”

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Posted 5 years ago

“Installed these in the outer 4 positions of my new PL300 integrated amp. Heavenly!”

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Posted 5 years ago

C. Rieck Staehle

Verified Reviewer

“Beautiful!”

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Posted 5 years ago