Mullard CV4004 / 12AX7 British New Old Stock Platinum Grade / No Cryo Reviews

4.9 Rating 41 Reviews

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909.931.9686

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joel.m@upscaleaudio.com

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2058 Wright Avenue,
2058 Wright Avenue
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“This is what a great tube can sound like it, changes the sound of your component when you roll the OEM tubes of your component. Upscale gives you enough information in their reviews that you get what you pay for and the sound you want from a tube.”

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Posted 8 years ago

Gregory Hecathorn

Unverified Reviewer

“It was time to step up and tube my phono stage and amp. Needed 2 pair of 12AX7's. Called Kevin, not much discussion, he recommended the Mullard CV4004. They sounded great, but i'm so clever, I rolled in some other combos, but nothing could match the music these tubes made, so back in they went. No looking back. will say that I had a spot for a pair of 12AU7's in the amp, so tried out a couple of sets but finally decided the Cifti was the one. Thanks Kevin”

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Posted 8 years ago

“Installed a pair in my VTL 6.5. The improvement was not subtle. A fantastic sounding tube from the moment I fired it up. Upscale has been great the whole way, from recommendations, to helping me out when I so skillfully ordered the wrong tubes the first time. Couldn't be happier.”

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Posted 8 years ago

“I'm using this wonderful NOS Mullard as the signal tube, together with two Radiotechniques as drivers in my Rogue M-180 mono blocks. The virtues of tube amplification are fully realized with these Mullards in my system as I listen to the most demanding classical orchestral recordings. Bravo a tous!”

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Posted 9 years ago

“Significant upgrade over the stock tubes in my Rogue Audio ST100.”

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Posted 9 years ago

“Oh I have all the best NOS tubes and this particular tube is the very best of the best. Most rollers will experience the old "Like I never heard my stereo before". It unveils even the most masked music. I will say the tubes from Upscale are of a quality unequaled anywhere. I will let you all know the price for a tube is no object to me and I will be paying large to keep this tube in my preamp. Best NOS 12ax7 anywhere, Tube Guru Rules.”

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Posted 9 years ago

“This is my first NOS tube. I am using two of them as the pre-amp tubes in a push-pull integrated amplifier. I was skeptical at first about NOS tubes because of their high price. However after buying this tube and trying it out, I can tell you it is worth every penny I paid for it, and more. This tube sounds absolutely fantastic in my amp. I am so happy I bought a them.”

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Posted 9 years ago

“Uncle Kevvy is the man, he know his tubes, slowly my system lost it's mojo, was thinking didn't it used to sound better??? Dropped a couple of these in my Klimo Merlin preamp and WOW, the biggest improvement I ever heard in my system. Improved in every way, and these tubes are not overly warm, they are wonderful. Thanks Uncle Kevvy!!!”

Helpful Report

Posted 9 years ago