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Vacuum Tube - 12AX7 / CV4004, Mullard Reissue
Mullard 12AX7 / CV4004 dual triode preamp tube. Made in Russa. The CV4004/12AX7 is a high gain, low noise valve with a short plate structure for reduced microphonics. Excellent for use in high gain Marshall pre-amplifier circuits where noise and microphonics can be a problem. Great for guitar amps.
- Short plate structure for reduced microphonics
- Best for guitar amp circuits
- 12AX7 / ECC83 valve equivalent
Accessory Items:
| No measurements are currently available for this product. Please contact us if you have any questions. |
| Packaging Dimensions | 2.75 in. × 1 in. × 1 in. | |
| Weight (Packaging) | 0.035 lbs. |
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Questions and Answers
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1 answers
Can you get these "Mullard" (CV4004) screened by APEX? If not exactly what kind of screening are done to them?
Asked by Anonymous on May 2nd, 2016.
May 3rd, 2016
Staff MemberTop Contributor
We do not test or screen the preamp tubes in house. All screening and testing would be done by the manufacturer.
1 answers
How is the life span of this Mullard?
Asked by Anonymous on September 6th, 2017.
Tube life will depend on how frequently you use your equipment and total hours of operation. Unfortunately we do not have any specs on how many hours this tube will last.
Product Reviews
I purchased these 12AX7's for my Marshall JVM-410H. Out of 5 tubes only 1 of them were usable, the other 4 tested bad and were worthless. They were so far off, they were causing 2 of my EL34's to red plate as soon as B+ was enabled. They looked pretty but that's as far as it goes. Next time it will be JJ tubes ONLY no more fake Mullard branded tubes for me.
Pre-Amp tube for Bugera T-5. Sounds good!
I compared several 12AX7 (specified for V1 in my amp) and found this Mullard tube to be my favorite of the 12AX7 tubes. It has a very nice clarity to the tone without too much drive. The sound is very articulate and not too bright. I don't like too much preamp drive and found my favorite tube for V1 is the Tung Sol 12AT7W. That will probably give some context to this review.
I like this mullard tube . I use it in my Marshall JCM 2000 100 DSL
Bought 2 of these Mullards. Put one in V1 of my Marshall SC and it made it more Marshally. The other into V1 of my 1990 Infinium and the same thing happened. Great mid focused 12AX7.
Joe
Bought 2 of these. Put one in V1 of my Marshall SC and it made it sound more Marshally. Put the other in V1 of my 1990 Infinium and the same thing happened. Great mid focused 12AX7.