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Mullard

New Matched Pair (2) Mullard CV4004 / 12AX7 Reissue Vacuum Tubes

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SKU:
NP035-2
UPC:
735757043665
MPN:
Pair CV4004
Shipping:
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Now: $49.60
Was: $55.11

Description

New Gain Matched Pair of Mullard CV4004 / 12AX7 Vacuum Tubes

Out of the two variations of Mullard's 12AX7 model, this tube (CV4004) is particularly great for guitar amplifiers. The CV4004 is the military designation for the 12AX7 and is its ruggedized counterpart which is modeled directly after the British military's 12AX7. Its short plate design cuts down on noise and microphonics which is especially important for this tube as these skew higher on their gain rating. With a sweet sound, they rival their originals.

Will work in place of: CV4004, 12AX7 Short Plate, 12AX7, ECC83, 12AX7A, 7025, 12AX7WA, 12AX7WC, 12AX7WB, ECC803S, CV4004, CV492

Testing and/or Matching

At VIVA TUBES, all of our customers get the same high standard of testing and matching. Some sellers charge more for premium matches but we believe all of our customers should get the same level of quality and service. 

Tubes are tested and/or matched at full operating voltage with regulated power supply on a Maxi Matcher tester for general mutual transconductance (Gm). In addition, power tubes are tested/matched by plate current (Ip) and preamp tubes are tested/matched by gain. Rectifier tubes will be tested for emissions on a calibrated military grade tube tester. 

Our goal is to match within 5% with an upper limit of 15% (15% is the industry limit to consider a set).

Hand written test data included.

Note that we do offer a few models which are tested & matched at the factory. They will be matched by the same parameters (Ip & Gm) but to the manufacturer's standards. Factory testing will be indicated in the item title and description. 

Guarantee

We offer a minimum 90 day guarantee covering functional defects - including noise unless otherwise stated. The guarantee period begins the day you receive your order.

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Additional Information

reverb_offer:
offreverb_condition=Brand New"
reverb_shipping_profile:
$12.99
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on
Item Type:
Vacuum Tubes
Production Era:
New/Current Production
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1 Review

  • 5
    Best All Around 12AX7

    Posted by Ray on 13th Feb 2024

    Great preamp tubes are a must! Sometimes the preamp can be overlooked cause of the almighty power tubes we love. My Hiwatt T20 came with Psvane tubes.(preamp & power) Loud, Bright, some decent mids & lows but would distort quickly even when the amp wasn't pushed. I knew I needed to get a smooth sounding tube with high gain. The CV4004/12AX7 Mullards are amazing!! Low microphonics for sure! I did my research on these tubes & just like myself....most tube amp geeks absolutely love these! They're smooth, good high end, good mids & low end! I also have these in my Marshall JCM 800. These are without a doubt Premium High Gain 12AX7's! 3 best brands for 12AX7 tubes in my opinion are 1. Mullard CV4004/12AX7, 2. Telefunken & 3. Tung Sol Gold Pins! Ultimately, I would say the Mullard CV4004/12AX7 are the best all around 12AX7 tube on the market!

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